The medium strength cast titanium alloy ZTi-3B developed by Shenyang Research Institute of Foundry in recent years has been introduced. The microstructures and mechanical properties of the alloy under different conditions at room and elevated temperatures have been studied. And the mechanical properties of investment specimens after heat treatment under room temperature were analyzed. Through experiment and actual application, the alloy ZTi-3B has been proved to have stable mechanical properties and good processability.