Ductility

A measure of a material′s ability to undergo appreciable plastic deformation before fracture; it may be expressed as percent elongation or percent area reduction from a tensile test.

Measured by elongation or reduction of area in a tensile test, by height of cupping in an Erichsen test or by other means.

See also: Embrittlement, Kink Test, Reduction of Area, Tensile Strength.