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The alpha-beta titanium alloy is heat treatable up to _______

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The alpha-beta titanium alloy is heat treatable up to _______

(a) 220^oC

(b) 320^oC

(c) 430^oC

(d) 540^oC

This question was posed to me during an online interview.

Enquiry is from Miscellaneous Alloying Elements in chapter Non Ferrous Materials of Engineering Material & Metallurgy

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Right answer is (c) 430^oC

The explanation is: Alpha-Beta alloys are the most widely used titanium alloys. This is because they are a combination of alpha and beta alloys. Alpha alloys are stable up to 540^oC but are not heat-treatable. Beta alloys are heat-treatable up to 320^oC. Alpha-Beta alloys are heat-treatable up to 430^oC but are more difficult to weld.

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