diff --git a/src/blenderbim/blenderbim/tool/material.py b/src/blenderbim/blenderbim/tool/material.py
index a6e0391030..e49b6a3d61 100644
--- a/src/blenderbim/blenderbim/tool/material.py
+++ b/src/blenderbim/blenderbim/tool/material.py
@@ -40,7 +40,9 @@ def disable_editing_materials(cls):
 
     @classmethod
     def duplicate_material(cls, material: ifcopenshell.entity_instance) -> ifcopenshell.entity_instance:
-        return ifcopenshell.util.element.copy_deep(tool.Ifc.get(), material)
+        new_material = ifcopenshell.util.element.copy_deep(tool.Ifc.get(), material)
+        new_material.Name = material.Name + "_copy"
+        return new_material
 
     @classmethod
     def enable_editing_materials(cls):
diff --git a/src/blenderbim/blenderbim/tool/style.py b/src/blenderbim/blenderbim/tool/style.py
index 88d6c23a77..9ff8c9aa4c 100644
--- a/src/blenderbim/blenderbim/tool/style.py
+++ b/src/blenderbim/blenderbim/tool/style.py
@@ -62,7 +62,9 @@ def disable_editing_styles(cls):
 
     @classmethod
     def duplicate_style(cls, style: ifcopenshell.entity_instance) -> ifcopenshell.entity_instance:
-        return ifcopenshell.util.element.copy_deep(tool.Ifc.get(), style)
+        new_style = ifcopenshell.util.element.copy_deep(tool.Ifc.get(), style)
+        new_style.Name = style.Name + "_copy"
+        return new_style
 
     @classmethod
     def enable_editing(cls, obj):