The ability of a metal to hold a load without permanent deformation is known as:

The ability of a metal to hold a load without permanent deformation is referred to as elasticity. This property allows a material to return to its original shape after the load is removed, as long as the load does not exceed the material's elastic limit. In essence, elasticity signifies how much strain a material can undergo before it begins to deform permanently.

Understanding elasticity is crucial in HVAC sheet metal applications because it determines how the ductwork and metal components will respond to various stresses during their installation and operation. If materials were to deform permanently under load, it could lead to inefficiencies or failures in the HVAC system.

While ductility is related to a material's ability to undergo significant plastic deformation before rupture, it is not the same as elasticity, which focuses on the reversible strain. Strength refers to the ability of a material to withstand an applied load without failing, but it doesn't specifically address the reversible nature of deformation. The term "shortness" does not align with any recognized mechanical property and is not relevant in this context.