Ductility 4 : The property by virtue of which a metal may be drawn out in tension without rupture, e. g. wire-drawing. It involves plasticity and tensile strength, e. g. lead wire is difficult to draw because its tenacity is low
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}