No experience with them, but if the vine grew
reasonable fast enough, and had leaves that would cover the metal, and stayed so the leaves were first to recieve the sun and shade the metal,
I doubt it would get thattttttttt hot to bother the
plant..
And most, fast
growing vines, are from Southern areas and should like heat..
I might not grow up a sweet pea on it, as it likes it cooler... but the right vine seems like it would work....
Is the copper trellis standing on it's own,
with good air flow or standing up against say like a building where the building heat would be on the back side of it???????
Very curious....