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The effect of joint addition of Zr, Ti and Cr on the grain refinement of commercial pure aluminium (99.7% Al) has been investigated by optical microscopy and scanning electron microscopy (SEM) as well as Energy Dispersive X-ray Spectroscopy (EDS). It was found that joint addition of 0.15 wt% Zr and 0.025 wt% Ti to Al can result in a remarkable refinement with an average grain size of 102 μm. It was found the optimum addition level of Ti to be 0.025 wt% in the presence of 0.1 % Zr and anydoi:10.21608/jpme.2020.33579.1037 fatcat:kec4uu2zfnbppivpluuxye223e