[Calvin Locke]

Either the "melts in your mouth, but not in your hand" property, or maybe some materials lose,
or lessen magnetic attraction in the cold, rather than being enhanced by it.

From what I remember from a show on ISS construction, I think copper was the choice for tools,
since it could withstand the cold and maintain many of the properties. That is, not become overly
brittle while still being hard.

I have no idea as to fasteners, pipes, trusses, etc.

[Frank_Discussion]

Station tools are primarily aluminum and stanless steel. Copper/brass and some plastics also are used, depending on operational needs for mechanisms.