Ductility is a mechanical property used to describe the extent to which materials can be deformed plastically without fracture.
In materials science, ductility specifically refers to a material's ability to deform under tensile stress; this is often characterized by the material's ability to be stretched into a wire. Malleability, a similar concept, refers to a material's ability to deform under compressive stress; this is often characterized by the material's ability to form a thin sheet by hammering or rolling. Ductility and malleability do not always correlate with each other; for instance, gold is both ductile and malleable, but lead is only malleable.[1] Commonly, the term "ductility" is used to refer to both concepts, as they are very similar.
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