“…While fibre reinforced composites offer the highest specific stiffness along reinforcement direction particulate MMC s are isotropic in their properties and are easier to process via powder metallurgy or casting route. The intrinsic workability of MMC s depends upon the initial microstructure as decided by the alloy chemistry and prior processing history and its response to the applied temperature, strain rate and strain in processing [1,2]. This response is embedded implicitly in the flow stress variation with temperature, strain rate and strain and is represented mathematically by constitutive equations.…”