system
Given the following post, respond as if you're commenting on Reddit:
human
Can metal shatter if cold enough?

Like in the movies, someone freezes a lock and breaks it, or Mr. Freeze freezing steel doors and driving through them? What real life effect does extreme cols have on metal?
gpt
The key is that the metal needs to go through a ductile-to-brittle transition, if they have one.  Most metals fall into one of two primary crystal structures either face-centered cubic (FCC) or body-centered cubic (BCC), though there are more less common options than the main two.  BCC metals (e.g. iron) will fracture if below the transition temperature.  However FCC metals (e.g. gold, copper) do not have a ductile to brittle transition, regardless of how cold you get.

Sauce: PhD in Materials.