Titanium Man

Boris Bullski, also known as Titanium Man, was an agent working for A.I.M.

Biography
Boris Bullski was a A.I.M. operative protecting their nuclear depots in Russia.

When Iron Man started searching for stolen Stark Tech and destroying different terrorist organizations, the two engaged in battle.

The Titanium Man armor used nuclear energy as source of energy, making it very powerful. In the end however, Boris was defeated by Iron Man when he cut his supply of nuclear energy before he could recharge the suit.

To get revenge and Stark Technology, A.I.M. sent Titanium Man and many operatives to take down Tony Stark in Stark Industries.

Although the efforts of the A.I.M., Titanium Man and the rest of A.I.M.'s forces were finally defeated.