So, a crack in a titanium spar can be detected under a layer of aluminum skin. 因此，它可以探測縱梁蒙皮中鈦金屬材料以下的鋁材裂紋。
Although most fully porous-coated tapered stems are made of cobalt chrome no difference has been recorded in survivorship of stems made of titanium. 儘管大部分全塗層多孔錐形柄由鈷鎳合金製成，但其與鈦金屬假體生存率基本一致。
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