Titanium alloy blisk is a typical lightweight and efficient part of advanced aero-engine compressor. While working

the blade and disk of blisk are subjected to quiet different thermal and loading condition

it is an effective mean to improve the weight reduction effect of compressor rotor and to meet more stringent and variable thermodynamic condition through dual-property design instead of the traditional uniform-property design. The feasibility of two gradient heat treatment processes (GHTP)

that is

separated-region temperature-controlled GHTP and partial-packed time-controlled GHTP

for manufacturing titanium alloy dual-property blisk is compared

and the microstructural controllability of blade

disk and transition zone is evaluated. The results show that the two processes can form stable and controllable temperature gradient in the transition zone of blisk

and dual microstructure is formed

that is

blade with duplex structure

disk with fine lamellar structure

the area and size of the transition zone is controllable

and the microstructure is gradually changed as well. According to the general contour characteristic

microstructure and performance requirements of the blisk forging

the suitable manufacturing process and corresponding process parameters are applied.