A material which has same elastic properties along its all loading direction known as isotropic material.
A material which exhibits different elastic properties in different loading direction known as an-isotropic material.
If a material regain its original dimension after removal of load, it is known as elastic material and the property by virtue of which it regains its original shape is known as elasticity.
Every material possess some elasticity. It is measure as the ratio of stress to strain under elastic limit.
The ability of material to undergo some degree of permanent deformation without failure after removal of load is known as plasticity. This property is used for shaping material by metal working. It is mainly depends on temperature and elastic strength of material.