Abstract: The quasi-static and dynamic stress-strain curves of the three aged U-Ti alloys were tested respectively by mechanical equipment and split Hopkinson pressure bar at room temperature, the tensile fractures and microstructure were analyzed by SEM and XRD. The results show that the three aged U-Ti alloys are sensitive of the strain rate. Shear fractures yield in the U-Ti alloys under the strain rate about 2 500 s^-1. Orientated dimples and distorted deformation are found on the fractures. Dynamic compression changes the grain orientations of the aged U-Ti alloys at three different states.