Hardness
It is the ability of a material to withstand scratching (abrasion) or indentation by another hard body, it is an indication of the wear resistance of the material.
Toughness
It is the ability of a material to absorb energy without rupturing.
Ductility
It refer to the capacity of substance to undergo deformation under tension without rupture as in wire drawing tube drawing operation.
Elasticity
It is the ability of a material to deform under load and return to its original size and shape when the load is removed.
