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. 
es: forming, forging, hammering 

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 

Malleability: Malleability 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.