The wing of the plane showed signs of metal fatigue.

机翼显示出金属疲劳的迹象。

《牛津词典》

One thing that does ground old aircraft is the impending failure of their aluminium structure from metal fatigue.

让老旧飞机搁浅的一件事就是飞机铝构造因为金属疲劳产生的故障隐患。

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So a tight wheel should last longer and be stiffer while a softer build can resist impacts better but will have greater chance of metal fatigue failures.

因此，一个张紧轮应持续时间更长，而被硬软建设能更好地抵御冲击，但将有更大的金属疲劳破坏的机会。

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The Royal Navy's official inquiry concluded HMS Affray sank because the snort mast, the tube through which the diesel engine "breathed" while the submarine was at periscope depth, snapped because of metal fatigue.

BBC: HMS Affray submarine sinking remembered off Alderney