Answer: Physical.
Step-by-step explanation:
To make an alloy, you mix 2 or more metals. This is a physical change as the components keep their original identities. You are applying heat to liquify the metals then mixing them. The structure of matter changes but not the identity of the substances making the alloy.
An example of chemical change would be when the chemical identity changes. Like burning and rusting. Making new different substances. Atoms are rearranged, therefore the components lose their identities.
Hope this helped