He was taken to Norman Osborn, where Dr. Baron Von Blitzschlag explained that the trauma accelerated his transformation that was already taking place.

By accessing secret computer files, the students realize that they are not the most powerful, nor the smartest or even the most highly trained kids that Osborn kidnapped.

[1] On a visit to the Raft, Mettle, Hazmat, and Veil plan to seek out Norman Osborn in his cell to kill him for revenge.

Carina temporarily transforms Mettle and his teammates to obtain powers from their future selves in order to defeat Korvac.

[7] In the Fear Itself storyline, Mettle throws a pole at an armor robot attacking Washington D.C., killing both the pilot and gunner.

When Titania and the Absorbing Man attacks the Infinite Mansion, Mettle and Hazmat chose to hold them back and sacrifice themselves in order for their teammates to escape.

[volume & issue needed] When Sebastian Shaw attempts to free the mutants, the Avengers Academy students side with them, so Tigra feints defeats and allows them to escape.

[volume & issue needed] He and the students defend Juston Seyfert's sentinel against Emma Frost, who was powered by the Phoenix Force.

[14] When suspicions arise as to where the abductees have gone, Arcade activates the "contingency", using a remotely operated copy of Mettle to assuage the worries of Hank Pym and explain away the absence of the teen heroes.

[15] When Deathlocket stumbles into an underground facility, she sees a robotic version of Mettle; its skull is exposed to showcase its mechanical parts.

[18][19][20] Possessing a body of living iridium, he is virtually indestructible, shown to be able to withstand the intense heat of a flame thrower.

The Avengers Mettle provides vital support to the defenses of Manhattan island during the cannibal plague sweeping the world.

[24] In his review of Avengers Academy #20, Pepose called Tom Raney's depiction of the "still-faced" Mettle "absolutely heartbreaking".