Zn-1.0Cu-0.2Ti（ZCT）and Zn-1.0Cu-0.2Ti-0.05Mg（ZCTMg） wrought zinc alloys were prepared by melt casting combining with extruding process. Phase compositions

microstructure

tensile behavior and creep behavior of the two alloys prepared were analyzed by OM （optical microscope）

SEM （scanning electron microscope） and tensile testing. Relationship between microstructure and properties of the alloys prepared were described. The results show that both ZCT alloy and ZCTMg alloy mainly consist of η phase、ε phase and TiZn15 phase. Compared with those of ZCT alloy

as-cast microstructure of ZCTMg is refined to some extent

and tensile strength is increased from 212.35 MPa of the extruded ZCT alloy to 248.90 MPa of the extruded ZCTMg. Creep resistance of the ZCTMg alloy is superior evidently to that of ZCT alloy

and the steady-state creep rate is decreased to 3.68×10-7 s-1 from 2.17×10-5 s-1 of ZCT alloy at 130 MPa

which are attributed to nano- TiZn15 phase located at grain boundary and coarse grain size.