Yes. Not only has Magneto turned
Control is a matter of debate, but Colossus can be affected by Magneto's powers easily. Magneto is able to hold Colossus at bay, freeze him in place or simply repel him great distances with apparently little effort.
Unlike adamantum, Magneto cannot manipulate vibranium – not if it's pure. Vibranium is a rare, extraterrestrial metallic ore. It has near-mystical properties that allow for energy manipulation and more. There is a Wakandan isotope and an Antarctic isotope, and both of them are completely unaffected by Magneto's powers.
Contrary to popular belief, Colossus' opponents can injure him in battle if they hit with enough force or with a stronger metal. His metal form can become severely bent, limiting his movement. Using his powers, Magneto can correct these fractures and essentially “heal” the metal mutant.
While in his armored form, Colossus requires no food, water or even oxygen to sustain himself and is extremely resistant to injury. He is capable of withstanding great impacts, large caliber bullets, falling from tremendous heights, electricity, and certain magical attacks.
So while Juggernaut is much more powerful, and would normally be able to win in a fight, Colossus could convince Cyttorak to transfer his power, or even cut off Cain Marko's connection to Cyttorak. Cain Marko would be left as a normal human.
Both mutants are ostensibly on the same side; they differ greatly in temperament but are not afraid to fight for mutants against a world that hates them. While Colossus uses his brute strength, Wolverine uses his claws, which can cut through almost anything - except Colossus himself.
Upon seeing Colossus, the monster stabs through Colossus with his adamantium claws. Even though Wolverine was transformed into a Wendigo, the moment illustrates just how powerful Logan's adamantium claws are. He pierced all the way through Colossus organic steel skin - that's no small feat.
Regardless, Colossus is still a formidable opponent and one of the most powerful members of the X-Men. But his osmium skin simply does not put him on the same level as those that wield vibranium, adamantium, or Uru.
He also does not need to breathe while transformed, but it is believed that he could not survive for long in a vacuum. Superhuman Durability: In his armored form, Colossus has a high degree of imperviousness to injury.
Yes. To have the hammer in his hand wouldn't and shouldn't ever happen. He's just not worthy of it under the magical conditions set on the hammer as per Odin The Asgardian All-Father. However, his genetic power and ability to control metal and magnetic fields would give him a leg up in countering its power.
No, Magneto cannot lift Mjolnir due to the enchantment. But there is another reason for it too. Mjolnir is made up of a metal named Uru, which is exclusive to Nidavellir.
Magneto is arguably one of the most powerful (and coolest) of the X-Men. Manipulating the electromagnetic spectrum, he can shift, shape, and summon metal. He's apparently so powerful in X-2: X-Men United that he can use his mutant abilities to rip the iron right out of your blood.
Colossus does have a huge weakness in the form of Vibranium. Any sort of physical contact with Vibranium will force Colossus to revert to his original form. This forced reversion doesn't last for long and he can return back to his armored form once he is away from the Vibranium.
Wolverine's adamantium claws can cut through anything - but they have a seriously hard time cutting through Colossus' skin for one very good reason. Marvel's Wolverine is known as a fierce fighter who can defeat even the mightiest of opponents - but this X-Men legend has a difficult time fighting Colossus.
As Strong as Steel
Colossus can convert the tissue of his entire body into an organic, steel-like substance analogous to osmium and to carbon steel that grants him superhuman strength (Class 100) and a high degree of imperviousness to injury.
X-Men Vs.
While Colossus tends to be the strongest member on any X-Men roster, the Hulk's a bit out of his league. Colossus knew this before he threw his first steel-coated punch, but still entered into a fight with the Hulk anyway. He got in a few good blows, but none of them phased the Hulk.
Colossus' impenetrable skin is not a unique superpower in the superhero universe. By being referred to as “organic steel” skin, the reader is led to believe that his mutant skin is made up of steel, an alloy with iron as the primary element. Roughly 96% of the human body is carbon, hydrogen, oxygen, and nitrogen.
Colossus is Weaker but a MUCH Better Fighter
While Colossus isn't the force of nature Hulk is, he does outclass the Jade Giant in some ways. Most prominently, he's a much better team player. While his relationship with Black Widow made him less volatile, the Hulk was always more of a weapon than a teammate.
He stays in his metal form and nearly collapses because of energy loss. Magneto restores the lost energy. So, he doesn't bleed blood, but he does bleed energy.
It is established that the Flora Colossus hero senses physical pain. While he can grow his limbs and cut them off, he can also grow and reduce their size.
Let's talk about that adamantium bullet
So while the bullet might penetrate Wolverine's skin, it seems it wouldn't kill him. In fact, in X-Men Origins: Wolverine, Wolverine is shot in the head with an adamantium bullet and, though he loses his memory, he survives.
Although Colossus's strength is victorious over Luke Cage, his victory is short-lived as he has chosen to help his extradimensional sister accomplish his mission, the death of the Avengers with his body included.
Wolverine might be a badass, but he was horrifically rendered useless when Magneto manipulated and ripped the adamantium off of his skeleton. Throughout his incredibly long life, Wolverine has endured a wide array of traumatic moments that would come to define the character during his publication history.
Wolverine Gets Torn in Half by the Hulk
Wolverine #1, the Hulk wasted little time before ripping Wolverine in two and tossing each half of his body in different directions. To survive, Wolverine's top half had to literally crawl until he located the bottom half and let his body come back from that one.