Durability- is defined as the ability of a material to remain serviceable in the surrounding environment during the useful life without damage or unexpected maintenance.Hardness- is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion.Flexibility- the ability to bend easily or without breaking.Elasticity- the ability of a deformed material body to return to its original shape and size when the forces causing the deformation are removed. Ductility- the ability of a material to have its shape changed without losing strength or breaking.