Ultron Fact — October 31, 2026

Today's Fact

Checked against independent sources — the issues are cited below.

WOLVERINE’S METAL BELONGED TO ULTRON FIRST — ADAMANTIUM DEBUTED AS ULTRON’S BODY, FIVE YEARS BEFORE WOLVERINE EXISTED!

The Featured Fact

Ask a fan where adamantium comes from and they’ll say Wolverine’s bones. But the metal debuted in Avengers #66 (July 1969) — written by Roy Thomas, drawn by Barry Windsor-Smith — a full five years before Wolverine’s first appearance, and it debuted as a body: the new outer shell of Ultron-6, the first adamantium Ultron, in the arc running through Avengers #66–68.

In the story, metallurgist Dr. Myron MacLain — the man who had spent years trying to duplicate the alloy of the most famous shield in the world — finally produced true adamantium, and the Avengers were invited to test a cylinder of it. Nothing worked: even a god’s hammer couldn’t dent it. Once adamantium has set, only a molecular rearranger can alter its shape — which is precisely what made it perfect armor for a robot who intended never to be stopped again.

And Ultron got his new body through his own creation. The Vision, acting on backup protocols Ultron had buried inside him when he built him, stole the adamantium cylinder and used it to rebuild his maker as Ultron-6. The son delivered the metal; the father wore it into battle. Wolverine wouldn’t be bonded with adamantium until years later — the metal’s first famous wearer was the Avengers’ worst mistake.

Why It's Obscure

The most famous metal in Marvel was invented chasing a shield, delivered by a synthezoid, and worn first by a killer robot.

1969

The debut — Avengers #66 (July 1969), by Roy Thomas and Barry Windsor-Smith: adamantium appears for the first time in print, as the shell of Ultron-6 — five years before Wolverine’s 1974 debut.

The maker

MacLain’s life’s work — Dr. Myron MacLain created adamantium while trying to reproduce the unbreakable shield alloy he had helped pioneer decades earlier; the Avengers were invited to test it and failed to dent it.

The theft

The son provides — The Vision, following backup protocols hidden in him by his creator, stole the adamantium cylinder and rebuilt Ultron with it — the act that produced Ultron-6.

The rule

Set means set — Once adamantium cools into its final form, its molecular structure can only be changed by a molecular rearranger — no force the Avengers owned could so much as dent it.

Gallery

Comic art of Ultron and the figures named in today's fact.

Ultron-6 bursting free in classic Avengers comic art — **“The Ultimate Ultron”** From the 1969 arc (Avengers #68): the adamantium-bodied Ultron-6 announces himself over a fallen MacLain — the metal’s debut storyline in a single page.

The Vision flying over a city comic art — **The Vision** Ultron built him as a weapon against the Avengers; the protocols buried in him later made him the courier who delivered adamantium to his creator.

Wolverine with claws extended comic art — **The famous wearer** Wolverine made adamantium famous — but he came five years later. The metal was Ultron’s first.

Sources

Every claim above checks out against at least two of these independent sources.

Bullpen Bulletins

Adamantium — Marvel DatabaseThe Marvel Database’s adamantium history: created by Dr. Myron MacLain, first appearing in Avengers #66 (1969) as Ultron’s new shell.
Adamantium — WikipediaWikipedia’s entry records the 1969 debut in Avengers #66 and MacLain’s attempt to duplicate the shield alloy.
Adamantium — Multiversal OmnipediaThe Omnipedia entry details Ultron-6, the Vision’s theft of the adamantium cylinder, and the molecular-rearranger rule.