Metal matrix composites (MMCs) possess a unique array of mechanical and physical attributes, setting them apart from unreinforced matrix alloys. These include exceptional specific strength, toughness and impact properties, remarkable thermal stability, heightened electrical, elevated wear resistance and commendable corrosion inhibition. To shape discontinuously reinforced MMCs into near-net shapes and enhance their strength, and ductility, secondary deformation processes can be employed. Conventional secondary processes forging, extrusion, rolling and friction stir processing are dealt with in detail in this chapter. Thermo mechanical treatment can be integrated into the manufacturing process immediately or following the initial stages of fabrication or consolidation. To achieve the desired microstructural and mechanical properties, processing conditions such as temperature, total deformation, and deformation rate must be optimized for the system being treated. Many research groups have conducted extensive investigations on the influence of hot and cold manufacturing on the mechanical and microstructural characteristics of MMCs. Comparison of different forming processes are highlighted and the relationship between them is expressed.