Abstract: A method for producing titanium alloy turbine blades comprising the steps of (a) forming turbine blades of titanium alloy through hot forging or machining, (b) cooling leading edges on tip portions of the turbine blades including covers thereof formed through hot forging or machining faster than blade main body after final hot forging or solid solution treatment, and (c) heat treating the cooled turbine blades. With this method, it is possible to manufacture titanium turbine blades in an economical fashion and obtain titanium alloy turbine blades superior in reliability by preventing erosion.

Abstract: Steel bodies composed of ferritic-austenitic Cr-Ni steel with 30 to 70% austenite and consisting essentially of:up to 0.1% by weight carbon,up to 1.0% by weight silicon,4.0% to 6.0% by weight manganese,22.0% to 28.0% by weight chromium,3.5% to 5.5% by weight nickel,1.0% to 3.0% by weight molybdenum,0.35% to 0.6% by weight nitrogen,balance iron and unavoidable impurities,are subjected to forging and after even second degree deforming, possess a notch impact strength (tenacity) according to the ISO-V test of more than 35 Joule and a minimum yield point of 600 N/mm.sup.2.