Abstract: Zn_100-xTi_x alloy was prepared by solid phase diffusion method, and its corrosion behavior in alkaline solution was studied by CV. The results indicate that addition of Ti to Zn shifts the corrosion potential E_corr of alloy electrodes to the more positive level and improves the deposition property of Zn(the active material) during the process of charge-discharge circulation. Alloy electrode with proper Ti content(x=5 et al.) gives a more positive passivating potential h_p and higher passive current density, as well as a better reversibility in oxidation and reduction reactions. Titanium eliminates the over-saturation phenomenon of zincate in electrolyte. In other hand, it is found that adding Ti also increases the corrosion current density i_corr of alloy electrode, decreases the overpotential of hydrogen evolution and increases anode polarization. The Zn_100-xTi_x alloy electrode with x=5 exhibits the best electrochemical property. Its discharge capacity at 30th and 35th charge-discharge cycle achieves 321 and 278 mA·h/g, respectively.