Abstract: The effects of solution and aging heat treatment processes on the microstructure and room temperature tensile properties of GH4169 superalloy forgings were analyzed. The results show that the heating time of the forging solution is too long or the repeated solution reduces the room temperature tensile performance. The forgings have been fully precipitated after normal aging. Prolonging the holding time at 620 ℃ can also supplement the precipitation of a small amount of enhanced phase, so that the strength can be improved. The morphology and quantity of delta phase affect the tensile properties of forgings at room temperature, especially the yield strength of the alloy. The heating process of solid solution heat treatment has an effect on the dissolution and precipitation of δ phase in the microstructure of forgings, and then on their mechanical properties. The results of this study can provide a reference for rational formulation of heat treatment process, improvement of microstructure and properties of GH4169 alloy forgings.