GFRP (Glass Fibre Reinforced Polymer) composites are emerging material in engineering field mainly in aerospace and automobile sector because of their excellence properties such as high toughness, low weight to volume ratio, high rigidity, strength, etc., to be widely used in various engineering application. However, the machinability of such composites is difficult to form desired shape. This thesis presents a TOPSIS Taguchi approach for parametric optimization of Glass fiber reinforced polymer bars