What does malleability refer to in metal properties?

Malleability refers to the ability of a metal to be deformed under compressive stress, which is often demonstrated through processes such as hammering or rolling. This property allows metals to be shaped into thin sheets or other forms without breaking. Malleable metals, like gold and aluminum, can be manipulated extensively while retaining their structural integrity, making them essential in various applications, from manufacturing to art.

The other options describe different properties of metals. The ability to conduct heat refers to thermal conductivity, which is a separate property that determines how well a material can transfer heat. Resistance to corrosion pertains to a metal's durability against chemical degradation, an important consideration for materials exposed to harsh environments. Finally, the ability to resist fracture relates to toughness, which describes how well a material can absorb energy and deform without breaking. Each of these properties is significant, but they do not equate to malleability, which is specifically concerned with deformability under compressive forces.