Abstract: The effects of titanium addition (0.08wt.%, 0.12wt.%, 0.16wt.%)on microstructure and tensile property of Zn-Al-Cu-Mg-RE alloy that prepared by centrifugal casting were studied. The results show that the prior precipitation η-Zn promoted by Ti as heterogeneous nucleation points nucleated and grew up. The addition of Ti changed the solidification mode of Zn-Al-Cu-Mg-RE alloys, meanwhile Al2Ti and Al1+xTi1-x which distributed in grain boundary and restrained grain growth were formed by Ti and Al. The tensile strength of alloy experienced fell, rose and fell, and the elongation rose and then fell with the increase of Ti addition. When Ti addition reached to 0.12% , the tensile strength decreased slightly from 310 MPa to 285 MPa, but the elongation improved from 4% to 7%, increasing by 75%.