Engineering applications find its use of structural materials like copper, titanium, aluminium and composites with extensive properties such as high resistance to corrosion, light in weight, etc. Binding of dissimilar metals as composite structure is of major attraction towards aerospace and automotive applications, because of its wide technological benefits. In recent days lot of changes have been developed in manufacturing of structures. Friction stir welding with weaving methods, abrasive jet machining with changes in nozzle design and severe plastic deformation of welded joints have been done to join various dissimilar materials and machining of composites.