Toughness

In materials science and metallurgy, toughness is the ability of a material to absorb energy and plastically deform without fracturing.[1] One definition of material toughness is the amount of energy per unit volume that a material can absorb before rupturing. This measure of toughness is different from that used for fracture toughness, which describes load bearing capabilities of materials with flaws.[2] It is also defined as a material's resistance to fracture when stressed.

This article is about toughness of physical objects. For the mathematical concept in graph theory, see Graph toughness.

Toughness as defined by the area under the stress-strain curve

Toughness requires a balance of strength and ductility.[1]

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