Abstract: A process for manufacturing a hollow turbo-machine blade comprises the steps of:(a) using computer aided design and manufacture (CAD/CAM) means to create, from a definition of the blade to be produced, a digital simulation of the flat form of the primary parts of said blade;(b) die-forging said primary parts in a press observing certain conditions;(c) machining said primary parts;(d) depositing diffusion barriers on at least one of said primary parts according to a predefined pattern;(e) assembling said primary parts, followed by diffusion welding them together under isostatic pressure;(f) inflating the welded assembly and shaping it by superplastic forming; and,(g) final machining;the process possibly also including an additional step of cambering and twisting the primary parts either before or after they are welded together.