Question

Titanium metal generally has a high melting point and low thermal conductivity.

(a) True

(b) False

This question was posed to me in homework.

The question is from Melting of Titanium Alloys topic in portion Foundry Introduction & Materials of Casting-Forming-Welding II

Answer 1

Right answer is (a) True

The best I can explain: Titanium metal has a high melting point and low thermal conductivity which is responsible for producing a steep thermal gradient in the casting during solidification. The reaction with mould materials forms surface layers which include oxygen and other elements taken from the mould. This affects the mechanical properties of the castings. So to avoid such problems, graphite or investments moulds are used instead of simple moulds.