Which precious metal is the most ductile?

The most ductile precious metal is gold.

Ductility is the ability of a material to be drawn into wire without breaking. Gold is exceptionally ductile because its atoms can shift through its crystal structure while the metal remains continuous. In suitable conditions, gold can be drawn into extremely fine wire, even approaching single-atom widths in specialized experiments.

Gold’s ductility is related to, but distinct from, malleability. Malleability describes how readily a metal can be hammered or rolled into sheets; gold is also regarded as the most malleable metal. A single gram can be beaten into roughly a square metre of gold leaf, thin enough to appear partly transparent.

Pure gold is usually too soft for everyday objects, so jewellery and coins are commonly alloyed with metals such as copper, silver or platinum-group metals. Those additions increase hardness and strength, but reduce the extreme ductility of pure gold. Silver and copper are highly workable too, yet they do not surpass gold in this property.

Another related fact readers often ask about is conductivity: gold is a good conductor of electricity and resists corrosion, which helps explain its use in reliable electronic contacts.