Ductility (Lat. ductilis, easily led, from ducere, to draw), one of the specific properties of solids, which allows them to be drawn into wire or filaments. Malleability is often regarded as a modification of ductility, but the more ductile metals are not always the most malleable. Iron, for instance, is very ductile, standing near the head of the list, but its order of malleability is much lower. The following eight metals are named in the order of their ductility: gold, silver, platinum, iron, copper, zinc, tin, lead. The same metals have the following order of malleability : gold, silver, copper, tin, platinum, lead, zinc, iron. Platinum is sometimes spoken of as the most ductile metal. This is because it is practicable, by enclosing it in a cylinder of silver, drawing the two together, and then dissolving away the silver with nitric acid, to obtain a finer wire than by any other process. Wollaston obtained in this manner a wire of platinum only 1/30,000 of an inch in diameter.