The direct performance is the material’s plasticity and tenacity descend.
直接表现为材料的塑性和韧性及抗拉强度大大下降，在钛表面出现裂纹、脱皮、断裂等现象。
参考来源 - 钛合金（Ti6A14V）表面加孤辉光离子无氢渗碳的研究The polyurethane elastomer has excellent abrasion resistance, tenacity, fatigue durability, chemical resistance and high impact resilience, etc. It’s a kind of engineering materials with broad applications.
聚氨酯(PU)弹性体具有优良的耐磨性能、韧性、耐疲劳性、耐化学腐蚀性及高抗冲性等,是一类用途广泛的工程材料。
参考来源 - 羟基氟硅油改性聚氨酯的合成、结构及性能的研究In this paper, thevertex-toughness and vertex-tenacity of some special graphs are given and proved.
本文在总结现有前人结论的基础上，计算并证明了几类特殊图的(点)坚韧度和(点)粘连度。
参考来源 - 几类特殊图的可靠性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
同义词： doggedness perseverance persistence persistency tenaciousness pertinacity
以上来源于: WordNet
N-UNCOUNT If you have tenacity, you are very determined and do not give up easily. 执著
Talent, hard work and sheer tenacity are all crucial to career success.
才能、勤奋和百分之百的执著对事业成功都是至关重要的。
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