diff --git a/app.py b/app.py
index c4e68d0..dbb5ec5 100644
--- a/app.py
+++ b/app.py
@@ -690,8 +690,9 @@ def materials():
                ROUND(COALESCE(SUM(j.weight_g),0),1) as total_used_g
         FROM materials m LEFT JOIN jobs j ON j.material_id=m.id
         GROUP BY m.id ORDER BY m.type, m.name''').fetchall()
+    types = sorted(set(m['type'] for m in mats if m['type']))
     conn.close()
-    return render_template('materials.html', materials=mats)
+    return render_template('materials.html', materials=mats, types=types)
 
 @app.route('/materials/new', methods=['GET','POST'])
 def new_material():
@@ -746,6 +747,23 @@ def restock_material(id):
     conn.commit(); conn.close()
     return redirect(url_for('materials'))
 
+@app.route('/materials/<int:id>/duplicate', methods=['POST'])
+def duplicate_material(id):
+    conn = get_db()
+    m = conn.execute('SELECT * FROM materials WHERE id=?',(id,)).fetchone()
+    if m:
+        conn.execute('''INSERT INTO materials(name,brand,type,color,price_per_kg,stock_g,low_stock_threshold_g,notes)
+            VALUES(?,?,?,?,?,?,?,?)''',
+            ('Copie de ' + m['name'], m['brand'], m['type'], m['color'],
+             m['price_per_kg'], 0, m['low_stock_threshold_g'], m['notes']))
+        new_id = conn.execute('SELECT last_insert_rowid()').fetchone()[0]
+        conn.execute('INSERT INTO material_price_history(material_id,price_per_kg) VALUES(?,?)',
+                     (new_id, m['price_per_kg']))
+        conn.commit(); conn.close()
+        return redirect(url_for('edit_material', id=new_id))
+    conn.close()
+    return redirect(url_for('materials'))
+
 @app.route('/materials/<int:id>/delete', methods=['POST'])
 def delete_material(id):
     conn = get_db()
diff --git a/templates/materials.html b/templates/materials.html
index 358bf98..1af8d55 100644
--- a/templates/materials.html
+++ b/templates/materials.html
@@ -4,25 +4,97 @@
 {% block content %}
 <div class="page-header d-flex justify-content-between align-items-center">
   <h1><i class="bi bi-boxes me-2" style="color:#8b5cf6"></i>Matières & Stock</h1>
-  <a href="{{ url_for('new_material') }}" class="btn btn-sm" style="background:#ff6b35;color:#fff">
-    <i class="bi bi-plus-lg me-1"></i>Ajouter une matière
-  </a>
+  <div class="d-flex gap-2">
+    <button class="btn btn-sm btn-outline-secondary" type="button" data-bs-toggle="collapse"
+            data-bs-target="#filterBar" aria-expanded="false" id="filterToggle">
+      <i class="bi bi-funnel me-1"></i>Filtres
+    </button>
+    <a href="{{ url_for('new_material') }}" class="btn btn-sm" style="background:#ff6b35;color:#fff">
+      <i class="bi bi-plus-lg me-1"></i>Ajouter une matière
+    </a>
+  </div>
+</div>
+
+<!-- Barre de filtres collapsable -->
+<div class="collapse mb-3" id="filterBar">
+  <div class="card card-body py-3">
+    <div class="row g-3 align-items-end">
+      <!-- Recherche texte -->
+      <div class="col-md-4">
+        <label class="form-label small text-muted mb-1">Rechercher</label>
+        <div class="input-group input-group-sm">
+          <span class="input-group-text"><i class="bi bi-search"></i></span>
+          <input type="text" id="searchInput" class="form-control" placeholder="Nom, marque…">
+          <button class="btn btn-outline-secondary" type="button" id="clearSearch" title="Effacer">
+            <i class="bi bi-x"></i>
+          </button>
+        </div>
+      </div>
+      <!-- Filtre par type -->
+      <div class="col-md-5">
+        <label class="form-label small text-muted mb-1">Type</label>
+        <div class="d-flex flex-wrap gap-1" id="typeFilters">
+          <button class="btn btn-sm btn-secondary active" data-type="all">Tous</button>
+          {% for t in types %}
+          <button class="btn btn-sm btn-outline-secondary" data-type="{{ t }}">{{ t }}</button>
+          {% endfor %}
+        </div>
+      </div>
+      <!-- Tri -->
+      <div class="col-md-3">
+        <label class="form-label small text-muted mb-1">Trier par</label>
+        <select id="sortSelect" class="form-select form-select-sm">
+          <option value="type-name">Type puis nom</option>
+          <option value="name">Nom (A→Z)</option>
+          <option value="price-asc">Prix/kg (croissant)</option>
+          <option value="price-desc">Prix/kg (décroissant)</option>
+          <option value="stock-asc">Stock (croissant)</option>
+          <option value="stock-desc">Stock (décroissant)</option>
+          <option value="usage-desc">Plus utilisé</option>
+        </select>
+      </div>
+    </div>
+    <!-- Résumé du filtre actif -->
+    <div class="mt-2 small text-muted" id="filterSummary"></div>
+  </div>
 </div>
 
 <div class="card">
   <div class="card-body p-0">
     {% if materials %}
-    <table class="table table-hover mb-0 align-middle">
+    <table class="table table-hover mb-0 align-middle" id="materialsTable">
       <thead class="table-light">
         <tr>
-          <th>Nom</th><th>Type</th><th>Couleur</th>
-          <th>Prix/kg</th><th>Stock</th><th>Commandes</th><th>Utilisé total</th><th></th>
+          <th data-col="name" class="sortable-th" style="cursor:pointer">
+            Nom <i class="bi bi-arrow-down-up text-muted small"></i>
+          </th>
+          <th data-col="type" class="sortable-th" style="cursor:pointer">
+            Type <i class="bi bi-arrow-down-up text-muted small"></i>
+          </th>
+          <th>Couleur</th>
+          <th data-col="price" class="sortable-th" style="cursor:pointer">
+            Prix/kg <i class="bi bi-arrow-down-up text-muted small"></i>
+          </th>
+          <th data-col="stock" class="sortable-th" style="cursor:pointer">
+            Stock <i class="bi bi-arrow-down-up text-muted small"></i>
+          </th>
+          <th>Commandes</th>
+          <th data-col="usage" class="sortable-th" style="cursor:pointer">
+            Utilisé total <i class="bi bi-arrow-down-up text-muted small"></i>
+          </th>
+          <th></th>
         </tr>
       </thead>
-      <tbody>
+      <tbody id="materialsBody">
         {% for m in materials %}
         {% set stock_pct = [[(m.stock_g / 1000 * 100)|round(0)|int, 0]|max, 100]|min %}
-        <tr>
+        <tr class="mat-row"
+            data-name="{{ m.name|lower }}{% if m.brand %} {{ m.brand|lower }}{% endif %}"
+            data-type="{{ m.type }}"
+            data-price="{{ m.price_per_kg }}"
+            data-stock="{{ m.stock_g }}"
+            data-usage="{{ m.total_used_g }}"
+            data-jobs="{{ m.job_count }}">
           <td class="fw-semibold">{{ m.name }}{% if m.brand %} <small class="text-muted">/ {{ m.brand }}</small>{% endif %}</td>
           <td><span class="badge bg-secondary">{{ m.type }}</span></td>
           <td>
@@ -49,24 +121,29 @@
                 {% if m.stock_g <= 0 %}bg-danger
                 {% elif m.stock_g <= m.low_stock_threshold_g %}bg-warning
                 {% else %}bg-success{% endif %}"
-                style="width:{{ [[(m.stock_g / 1000 * 100)|round(0)|int, 0]|max, 100]|min }}%">
+                style="width:{{ stock_pct }}%">
               </div>
             </div>
           </td>
           <td>{{ m.job_count }}</td>
           <td>{{ m.total_used_g }} g</td>
           <td>
-            <div class="d-flex gap-1">
+            <div class="d-flex gap-1 flex-nowrap">
               <button class="btn btn-sm btn-outline-success py-0" data-bs-toggle="modal"
-                      data-bs-target="#restockModal{{ m.id }}">
-                <i class="bi bi-plus-lg"></i> Stock
+                      data-bs-target="#restockModal{{ m.id }}" title="Réapprovisionner">
+                <i class="bi bi-plus-lg"></i>
               </button>
-              <a href="{{ url_for('edit_material', id=m.id) }}" class="btn btn-sm btn-outline-secondary py-0">
+              <a href="{{ url_for('edit_material', id=m.id) }}" class="btn btn-sm btn-outline-secondary py-0" title="Modifier">
                 <i class="bi bi-pencil"></i>
               </a>
+              <form method="POST" action="{{ url_for('duplicate_material', id=m.id) }}" style="display:inline">
+                <button class="btn btn-sm btn-outline-secondary py-0" title="Dupliquer">
+                  <i class="bi bi-copy"></i>
+                </button>
+              </form>
               <form method="POST" action="{{ url_for('delete_material', id=m.id) }}"
-                    onsubmit="return confirm('Supprimer cette matière ?')">
-                <button class="btn btn-sm btn-outline-danger py-0"><i class="bi bi-trash"></i></button>
+                    onsubmit="return confirm('Supprimer {{ m.name }} ?')">
+                <button class="btn btn-sm btn-outline-danger py-0" title="Supprimer"><i class="bi bi-trash"></i></button>
               </form>
             </div>
           </td>
@@ -106,6 +183,12 @@
         {% endfor %}
       </tbody>
     </table>
+    <!-- Ligne "aucun résultat" -->
+    <div id="noResults" class="text-center text-muted py-4" style="display:none">
+      <i class="bi bi-search fs-3 d-block mb-2"></i>
+      Aucune matière ne correspond aux filtres.
+      <button class="btn btn-sm btn-link p-0 ms-1" id="resetFilters">Réinitialiser</button>
+    </div>
     {% else %}
     <div class="text-center text-muted py-5">
       <i class="bi bi-boxes fs-1"></i>
@@ -118,3 +201,151 @@
   </div>
 </div>
 {% endblock %}
+
+{% block scripts %}
+<script>
+(function() {
+  const rows = Array.from(document.querySelectorAll('.mat-row'));
+  if (!rows.length) return;
+
+  let activeType = 'all';
+  let searchText = '';
+  let sortKey = 'type-name';
+
+  const tbody     = document.getElementById('materialsBody');
+  const noResults = document.getElementById('noResults');
+  const summary   = document.getElementById('filterSummary');
+  const filterBar = document.getElementById('filterBar');
+  const toggle    = document.getElementById('filterToggle');
+
+  // Persist filter bar open/close state
+  const STORE_KEY = 'mat_filter_open';
+  if (localStorage.getItem(STORE_KEY) === '1') {
+    filterBar.classList.add('show');
+    toggle.setAttribute('aria-expanded', 'true');
+    toggle.classList.add('active');
+  }
+  filterBar.addEventListener('shown.bs.collapse', () => {
+    localStorage.setItem(STORE_KEY, '1');
+    toggle.classList.add('active');
+  });
+  filterBar.addEventListener('hidden.bs.collapse', () => {
+    localStorage.setItem(STORE_KEY, '0');
+    toggle.classList.remove('active');
+  });
+
+  // ── Search ──────────────────────────────────
+  document.getElementById('searchInput').addEventListener('input', function() {
+    searchText = this.value.toLowerCase().trim();
+    render();
+  });
+  document.getElementById('clearSearch').addEventListener('click', function() {
+    document.getElementById('searchInput').value = '';
+    searchText = '';
+    render();
+  });
+
+  // ── Type filters ────────────────────────────
+  document.querySelectorAll('#typeFilters button').forEach(btn => {
+    btn.addEventListener('click', function() {
+      document.querySelectorAll('#typeFilters button').forEach(b => {
+        b.classList.remove('active', 'btn-secondary');
+        b.classList.add('btn-outline-secondary');
+      });
+      this.classList.add('active', 'btn-secondary');
+      this.classList.remove('btn-outline-secondary');
+      activeType = this.dataset.type;
+      render();
+    });
+  });
+
+  // ── Sort select ─────────────────────────────
+  document.getElementById('sortSelect').addEventListener('change', function() {
+    sortKey = this.value;
+    render();
+  });
+
+  // ── Column header click sorts ───────────────
+  document.querySelectorAll('.sortable-th').forEach(th => {
+    th.addEventListener('click', function() {
+      const col = this.dataset.col;
+      const map = {
+        name: 'name',
+        type: 'type-name',
+        price: 'price-asc',
+        stock: 'stock-desc',
+        usage: 'usage-desc'
+      };
+      if (map[col]) {
+        document.getElementById('sortSelect').value = map[col];
+        sortKey = map[col];
+        render();
+      }
+    });
+  });
+
+  // ── Reset ───────────────────────────────────
+  const resetBtn = document.getElementById('resetFilters');
+  if (resetBtn) resetBtn.addEventListener('click', reset);
+
+  function reset() {
+    searchText = '';
+    activeType = 'all';
+    sortKey = 'type-name';
+    document.getElementById('searchInput').value = '';
+    document.getElementById('sortSelect').value = 'type-name';
+    document.querySelectorAll('#typeFilters button').forEach(b => {
+      b.classList.remove('active', 'btn-secondary');
+      b.classList.add('btn-outline-secondary');
+    });
+    const allBtn = document.querySelector('#typeFilters button[data-type="all"]');
+    allBtn.classList.add('active', 'btn-secondary');
+    allBtn.classList.remove('btn-outline-secondary');
+    render();
+  }
+
+  // ── Main render ─────────────────────────────
+  function render() {
+    // 1. Filter
+    const visible = rows.filter(r => {
+      const matchType   = activeType === 'all' || r.dataset.type === activeType;
+      const matchSearch = !searchText || r.dataset.name.includes(searchText);
+      return matchType && matchSearch;
+    });
+
+    // 2. Sort
+    visible.sort((a, b) => {
+      switch (sortKey) {
+        case 'name':       return a.dataset.name.localeCompare(b.dataset.name);
+        case 'type-name':  return a.dataset.type.localeCompare(b.dataset.type)
+                               || a.dataset.name.localeCompare(b.dataset.name);
+        case 'price-asc':  return parseFloat(a.dataset.price) - parseFloat(b.dataset.price);
+        case 'price-desc': return parseFloat(b.dataset.price) - parseFloat(a.dataset.price);
+        case 'stock-asc':  return parseFloat(a.dataset.stock) - parseFloat(b.dataset.stock);
+        case 'stock-desc': return parseFloat(b.dataset.stock) - parseFloat(a.dataset.stock);
+        case 'usage-desc': return parseFloat(b.dataset.usage) - parseFloat(a.dataset.usage);
+        default:           return 0;
+      }
+    });
+
+    // 3. Reorder DOM & show/hide
+    const hidden = rows.filter(r => !visible.includes(r));
+    hidden.forEach(r => { r.style.display = 'none'; });
+    visible.forEach(r => { r.style.display = ''; tbody.appendChild(r); });
+
+    // 4. No results message
+    noResults.style.display = visible.length === 0 ? '' : 'none';
+
+    // 5. Active filter summary
+    const parts = [];
+    if (activeType !== 'all') parts.push(`Type : <strong>${activeType}</strong>`);
+    if (searchText) parts.push(`Recherche : <strong>"${searchText}"</strong>`);
+    summary.innerHTML = parts.length
+      ? `${visible.length} résultat${visible.length !== 1 ? 's' : ''} — ${parts.join(' · ')}`
+      : '';
+  }
+
+  render();
+})();
+</script>
+{% endblock %}