Abstract: Objective: In order to meet the needs of high-quality structural component production and multi scenario applications. Method: α+β - type composite TC11 titanium alloy was selected as the research material, and the substrate was polished to eliminate the oxide film. The additive preparation and sampling were completed using wire cutting equipment; Considering the longitudinal section of the wall for sample cutting, using the surface difference algorithm for shape error compensation, and combining Rayleigh Ritz to construct an error prediction model, the shape control of thin-walled parts in titanium alloy additive manufacturing was completed. Result: The shape control technology of titanium alloy additive manufacturing thin-walled parts combined with surface interpolation algorithm has good control effect, which is related to laser power, wire feeding speed, wire spacing, and scanning speed. Conclusion: Studying the shape control technology of thin-walled parts in titanium alloy additive manufacturing can solve the problem of wear and work hardening in existing processes, and make certain contributions to improving the quality of titanium alloy additive manufacturing and meeting the comprehensive economic benefits of the manufacturing industry.