延性和展性 (ductility and malleability) ：延性是材料在拉力作用下不折断而经受恒久变形的能力。展性是材料在压力作用不折断而经受恒久变形的能力。
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Two important working properties of metals are ductility and malleability.
延展性和可锻性是金属的两种重要加工性能。
Tests used to assess the ductility and malleability of stainless steel subjected to bending.
测试不锈钢在弯曲状态下的延展性及可锻性。
Strength and hardness increase with increasing amount of cold work and at the same time the remaining ductility and malleability decreases (Figure 6.1).
随着冷处理的增加金属的刚度和强度得到提升，但同时韧性和延展性降低了。
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