Provided is a high-strength titanium alloy member having excellent fatigue resistance, obtaining high strength and high yield strength not only in the surface but also across the entire inside of the member, and also applying a large, deep compression residual stress in the surface vicinity, in the whole of a versatile, inexpensive α-β-type titanium alloy member. Also provided is a production method therefor. The production method comprises: a preparation step for a raw material comprising titanium alloy； a nitriding step in which a nitrogen compound layer and/or a nitrogen solid solution layer is formed on the surface layer of the raw material by nidridation and a nitrogen-containing raw material is prepared； a mixing step in which the raw material and the nitrogen-containing raw material are mixed and a nitrogen-containing mixed material is obtained； a sintering step in which nitrogen-containing mixed materials are bonded together and nitrogen in the nitrogen-containing raw material is uniformly scattered in a solid solution state across the entire interior and a sintered titanium alloy member is obtained； a hot plastic working step in which the sintered titanium alloy member is hot plastic worked and a treated member is obtained and/or a heat treatment step in which the sintered titanium alloy member is heat treated and a treated member is obtained； and a surface treatment step in which compression residual stress is applied to the treated member.La présente invention concerne un composant en alliage de titane à haute résistance ayant une excellente résistance à la fatigue, présentant une résistance élevée et une limite d'élasticité élevée non seulement à la surface mais également de part et d'autre de l'intérieur du composant entier, et appliquant également une contrainte résiduelle de compression élevée profonde au voisinage de la surface, dans la totalité d'un composant en alliage de titane de type α-β polyvalent, économique. La présente invention concerne en
