Is it possible to make an alloy that melts at low temperatures and solidifies at high temperatures?

In my world I've created an alloy that can melt at low temperatures and solidify at high temperatures. This got me wondering, is something like this actually possible/does it exist. With most materials, of course, bonds are broken between individual molecules and atoms at high temperatures which creates a more liquid consistency. I did a bit of research but it appeared inconclusive.

Is there an element or alloy that melts at low temperatures, and solidifies at high temperatures?

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Is it possible to make an alloy that melts at low temperatures and solidifies at high temperatures?

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