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The present work focused on application of TOPSIS along with Taguchi method to optimize machining parameters in Electrical Discharge Machining (EDM) of Titanium alloy (Ti-6Al-4 V) considering it as multi-attribute problem. The L9 orthogonal array of Taguchi method is used to conduct experiments. During experimentation Titanium alloy (Ti-6Al-4 V) is chosen as a work material and electrolyte copper is selected as a tool electrode. Whereas peak current, pulse on time and pulse off time are chosen as machining parameters. TOPSIS method is applied to determine the optimal combination of machining parameters to yield maximum material removal rate MRR), minimum tool wear rate (TWR) and surface roughness (SR) simultaneously. Confirmation experiments have been done at optimal parametric setting, then results are compared with predicted values and it was found that percentage error is less than 5.

Conventional materials like steel, brass, aluminum etc will fail without any indication, cracks initiation, propagation, will takes place with a short span. Now-a-days to overcome these problem, conventional materials are replaced by hybrid composite material. Not only have this conventional material failed to meet the requirement of high technology applications, like space applications and marine applications and structural applications in order to meet the above requirements new materials are being searched. Hybrid composites materials found to the best alternative with its unique capacity of designing the materials to give required properties and light weight. This paper aims to preparing hybrid composite using artificial fibers. Epoxy as resin and glass fiber as fiber for artificial hybrid composite to make a laminate for preparing leaf spring.