Question: what are common uses of alkaline earth metals?
Answer: Beryllium.
1) It is used in the manufacture of alloys. ... 
2) Metallic beryllium is used for making Windows of X- ray tubes.
Magnesium.
1) It is used to prepare alloy with aluminium , zinc , manganese and tin.
2) Magnesium – aluminium alloy being light in mass are used in construction of aircrafts.