How you can increase melting point of aluminium?

Answer 1

To increase the melting point of aluminium, (and treating this as a philosophical question), then hardening the 'crystal matrix' may be one approach.

Surface hardening by work hardening, or perhaps by inserting nitrogen ions into the surface as is used in metal(ferrous) hardening.

Answer 2

The melting point of aluminum can be increased by adding alloying elements like copper or magnesium, which form stronger bonds with aluminum atoms. Additionally, refining the crystalline structure of aluminum through processes like heat treatment can also increase its melting point.