If a material can be permanently deformed without breaking it is said to be?

If a material can be permanently deformed without breaking it is said to be ductile. Ductility is a measure of the extent to which a material can be deformed plastically before it ruptures. Ductile materials are those that can withstand significant plastic deformation without failing. This property is important in many engineering applications, where materials are subjected to high levels of stress and strain. Some examples of ductile materials include metals (such as steel, aluminum, and copper), polymers (such as rubber and plastic), and some ceramics (such as porcelain and glass).