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Factors Affecting Elasticity

Hammering and rolling Crystal grains break up into smaller units by hammering and rolling. This result in increase in the elasticity of material.
Annealing The metals are annealed by heating and then cooling them slowly. Annealing results in decrease in the elasticity of material.
Temperature Intermolecular forces decrease with rise in temperature. Hence, elasticity decreases with rise in temperature but elasticity of invar steel (alloy) does not change with change of temperature.
Impurities Due to impurities in a material, elasticity can increase or decrease. The type of effect depends upon the nature of impurities present in the material.

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