For TC11 and TC19 titanium alloy forgings used in aircraft engine compressor integral leaf disc and other components, the comparative analysis and study on tensile, impact toughness and low-week fatigue under load / no load conditions were carried out based on their typical use conditions. The results show that TC11 has a typical two-state structure, and TC19 has a whole-sheet mesh basket organization; TC19 is significantly stronger than TC11 at 100℃ to 400℃.? The high temperature gap impact toughness value of TC19 is significantly higher than that of TC11 alloy. Under the peak stress load of 100℃ and 855MPa, the load and load fatigue life of TC19 alloy are significantly higher than that of TC11 alloy, and both alloys have certain load effect. TC19 alloy has better mechanical properties than TC11 alloy under the same conditions, and can be used as one of the preferred materials for the whole leaf disc and other parts of the next-generation aero-engine compressor.