writes:

Sure. But it's the surface that ice forms upon, not the warmer
interior. A composite skin might cool off faster since it's insulated
from the rest of the structure.

Yes, but this might not be the source of most problems.

Consider an aircraft that has been soaking in the cold for a long
time. If it's built of highly heat-conductive materials, it could
easily freeze any rain falling upon the wings when it is moved
outside. I recall at least one commercial jet that may have been
brought down by this effect, but I don't remember the details.

If the wings contain fuel (which has a high specific heat and thus can
store a lot of heat or cold) and highly conductive wings, it could
freeze water at ambient temperatures well above freezing after being
cold soaked, and develop a substantial layer of ice in no time.

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