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TIMETAL21S（Ti-15Mo一3Nb-3Al－0．2Si）是一种通过热处理可获得高强度而在固溶处理条件下可冷成形的亚稳产钛合金．它在许多特殊条件下具有优异的耐蚀性能，适于海上石油、天然气设备应用．由SINThF和WE组织的一个联合项目对用于拖性井管（riser）和输送管（flowline的钛合金
TIMETAL21S (Ti-15Mo-3Nb-3Al-0.2Si) is a metastable titanium alloy that can be cold formed by solution treatment under conditions of high strength obtained by heat treatment. It has excellent corrosion resistance under many special conditions and is suitable for offshore oil and gas equipment applications. A joint project organized by SINThF and WE is responsible for the use of titanium alloys for dragging riser and flowline