在比较钛合金时,不仅以制品的状态及截面形状等作为工业上的大致标准,而且也希望用结晶结构作为标准。从结晶结构上看,全部的实用钛合金,是以密排六方晶结构的α相和体心立方结构的β相的同素变态相之一为基的固溶体。象硬铝那样,利用金属间化合物的钛合金的研究,除唯一例外的Ti—Cu合金以外, In comparing titanium alloys, not only the product status and cross-sectional shape as the industry standard, but also hope that the crystal structure as a standard. From the crystal structure point of view, all of the practical titanium alloy is a solid solution based on one of the hexagonal close-packed hexagonal α-phase and the body-centered cubic β-phase allotropic phase. Like hard aluminum, the use of intermetallic compounds of titanium alloys, with the exception of the only exception to the Ti-Cu alloy,