Abstract In the present work the effect of treatment of Titanate (IV) oxide as coupling agent on Magnesium hydroxide filled Ethylene Vinyl-Acetate Copolymer (EVA) and High Density Polyethylene (HDPE) as a matrix has been studied. Tensile properties and surface properties were compared and investigated by using a universal testing machine and Scanning Electron Microscopy (SEM) respectively. The Result Clearly showed that the treatment of Magnesium hydroxide imparts better reinforcing properties. Tensile strength, elongation at break, elastic modulus and hardness were improved by 19.05%, 200%, 66.67% and 1.0% respectively at (0.14) volume fraction.