The following are the mechanical properties of metal: Malleability : It is the property by which a metal can be rolled into thin sheets. Highly malleable metals (like Mild Steel) are extensively used in making sheet metals Elasticity : Whenever an external force is applied on a metal, it deforms. Elasticity is the property by virtue of which a metal regains its original shape when the external force applied on it is removed. Plasticity : Plasticity is the property by which a metal retains its deformation permanently, when the external force applied on it is removed. Examples: forming, forging, hammering Ductility : Ductility is the property by which a metal can be drawn into thin wires. It is determined by percentage elongation and percentage reduction in area of a metal. Toughness : When a huge external force is applied on a metal, the metal will experience fracture. Toughness is the ability of a metal to resist fracture. Strength : When external forces are applied on a metal, breaking (brittle metal) or yielding (ductile metal) may occur. Strength is the property of a metal by which it resists external force without breaking or yielding. Stiffness : When an external force is applied on a metal, it develops an internal resistance. The internal resistance developed per unit area is called stress. Stiffness is the ability of a metal to resist deformation under stress. Creep : When a metal is subjected to a constant load (below its yield point), at high temperature, for a prolonged period of time, it undergoes a permanent deformation. This tendency of the metal is called creep. Resilience : Resilience is the ability of a metal to absorb energy and resist soft and impact load. Hardness : Hardness is the ability of a metal to resist permanent change of shape caused by an external force