Which material property indicates a material's ability to be stretched without breaking?

Ductility is a material property that reflects its ability to undergo significant plastic deformation before rupture, meaning it can be stretched into a wire-like form without breaking. When a material is ductile, it allows for changes in shape and size under tensile stress, making it particularly useful in applications where flexibility and the ability to deform without failure are required, such as in metals used for wiring and structural components.

Plasticity refers to a material's ability to deform permanently under stress, but it does not exclusively indicate the ability to be stretched or drawn out. Stiffness is a measure of a material's resistance to elastic deformation when a load is applied, and toughness describes the ability of a material to absorb energy and plastically deform without fracturing. While all these properties are important in material science, ductility specifically focuses on the aspect of being stretched without breaking, making it the correct choice for this question.