As-cast microstructure of AM60 magnesium alloy with different Ti content was observed by OM（optical microscope）

XRD（X-ray diffraction meter）and SEM（scanning electron microscope）and ambient tensile strength of the alloy was measured.The results reveal that the minor Ti addition can remarkably refine the as-cast microstructure of AM60 magnesium alloy.The desirable refinement effect with uniformly distributed fine second phase can be observed with 0.2% Ti addition

in which the semi-continuous β-Mg17Al12 distributed along grain boundary was converted into particle and dispersively distributed TiAl3 particle can be created in α-Mg phase

obtaining the highest tensile strength and elongation.When Ti addition is more than 0.2%

the tensile strength and elongation of the alloy are decreased with increasing in Ti addition as a result of the coarsenization of β-Mg17Al12 and α-Mg phase

and are superior to those of AM60 magnesium without Ti.The improvement of mechanical properties of AM60 magnesium alloy is attributed to Ti addition refining grain size and β-Mg17Al12 phase in the alloy as well as formed TiAl3 phase distributed into the matrix and secondary phase to strengthen the alloy.