Ductility

Ductility, plastic property of certain substances, notably metals, which allows them to be drawn into the form of wires or extruded through an aperture without rupturing or returning to their original shape. Gold is the most ductile of all metals, but silver, platinum, copper, aluminum, and iron also exhibit a high degree of ductility. Hot glass can be drawn into very fine threads, though it is very brittle at ordinary temperatures.