Question

what metal started being produced in 1946 that is 45% lighter than steel and used a lot in aerospace applications?
□ aluminum
□ bauzite
titanium
chromium
rewatch

Explanation:

Titanium started large - scale production around 1946. It has a density that makes it 45% lighter than steel and is widely used in aerospace applications due to its high strength - to - weight ratio. Aluminum has been in use for a long time before 1946, bauxite is an ore (not a metal), and chromium doesn't have the described properties related to aerospace use and the 1946 production timeline.

Answer:

titanium