Toughness:
It
is defined as the ability of material to absorb energy upto fracture during the
plastic deformation. It depends upon the strength and ductility.
Hardness:
It
is the property of a material which resists Indentation (or) deformation.
Hardness is a desired property for cutting tool, ball bearing and other
components which resists wear.
Brittleness:
It
is the property of a material which exhibits sudden fracture without any visible
deformation. It is the opposite property to Toughness.
