但适宜作为高档金属眼镜架用材料的钛合金，必须具有良好的冷加工性能。
Therefore titanium and metal alloy of titanium have fine and overall properties. However, the titanium alloy that can be made of upscale metal spectacles must have good cold deformation.
BT 421111钛合金是最新研制的一种综合性能良好的钛合金，其强度高、塑性好、冷加工性能优良。
BT421111 Titanium alloy is a alloy with good comprehensive properties which is developed lately. It has the advantages of high strength, good plasticity, excellent cold workability and so on.
但是，这类材料的加工性能很差，冷加工成型技术尚难突破。
However, the processing performance of the material is very poor and the cold processing forming technology is still difficult for breakthrough.
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