What is an example of a very ductile material?

Copper is considered a very ductile material because it can be easily drawn into wires without breaking. Ductility refers to the ability of a material to deform under tensile stress, meaning that it can stretch and change shape significantly before failure. Copper exhibits high ductility as a result of its crystal structure and the metallic bonding that allows for dislocation movement. This property makes copper not only useful for electrical wiring and applications where shaping is necessary, but also resilient under various conditions.

In contrast, while aluminum is also ductile, it is generally considered less so than copper. Rubber demonstrates elasticity rather than ductility and can stretch but does not retain the same properties as a metallic ductile material when it comes to deformation under tensile stress. Glass, on the other hand, is very brittle and does not exhibit ductility, as it shatters rather than deforms when subjected to stress. Thus, copper stands out as a prime example of a very ductile material.