Originally posted by Robtard
Magneto (as an old man) has shown the ability to rip out and lift the Golden Gate Bridge and support structure with his powers, that's 880,000+ tons in lighting weight alone, without factoring in the ripping force required behind the act.Meaning he could impale Thanos with steel beams with that amount of force. I don't think Thanos could take it indefinitely.
The ability to lift tons of metal is irrelevant when it comes to damaging something vastly more durable than metal with metal itself. What matters is kinetic energy, not force, when trying to harm Thanos with scrap metal.
In the film, the scrap metal was moving at under 300 ft/s, and there’s no evidence to suggest otherwise. So at best, Magneto could use it to push or move Thanos upon impact. It would not have the necessary kinetic energy to do any damage.
Hypothetically, if Thanos were backed against an indestructible, immovable wall, the scrap metal would simply be destroyed on contact before it could penetrate him. Think of a bullet disintegrating on a metal plate after contact.