PLASTICITY Plasticity: Is a mechanical behavior characteristic of certain anelastic materials consisting of the capacity to deform permanently and irreversibly when subjected to stresses above their elastic range, above their elastic limit. One example of sustainable material is steel. Ductility is the property that some metals and allies have, when under the action of a force, they can be stretched without being twisted (metal sheet) ( video) Malleability is the ability to be easily changed into a new shape (metal threads)