system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] What is the strongest, yet also mass-producible, metal in the Marvel Universe?

Title. Thank you in advance, folks.
gpt
Secondary Adamantium.

The Doylist history behind this is interesting. Writers realized that they couldn't keep giving villains adamantium weapons/armor/robots then subsequently have the heroes destroy them if adamantium was supposed to be invincible. Thus, they came up with secondary adamantium. This stuff was easier to mass-produce (hence why villains/mercenaries were constantly showing up with the stuff) but easier to damage. Still, adamantium is adamantium, superior to any other conventional metal/alloy on Earth.