Method and system for manufacturing multi-component complex shape parts consisting of monolithic and powder materials working at different performance conditions based on hot isostatic pressing of the monolithic elements and powder material including preliminary heat treatment of the said monolithic elements of the multi-component part wherein they are a subject to high temperature solution treatment at elevated isostatic gas pressure followed by quenching in order to homogenize their material, to dissolve residual cast eutectic and to provide the micro-structure and the properties insensitive and steady during the subsequent HIP and heat treatment of the powder material.