As Steve, Rhodey and Natasha enter, Rocket turns the gauntlet over to find the Infinity Stones …
Once all six stones are brought together, Thanos will have unprecedented power, capable of destroying and enslaving entire planets. Thanos has been in the other movies but only as a small character. One for each hand. Thor tries to attack Thanos, but Thanos slaps him back. In an epic battle for the fate of the universe, whose hand will win the day? The Mad Titan Thanos is on a crusade to find the six Infinity Stones, but a team of mighty heroes has assembled to stop him. He then lands a blow to Hulk's neck, causing him to cry out in pain. Thanos lifts Hulk over his head and slams him to the floor. So as I said, this is info from the comic books, but it can be used to rationalize why he can hold the stones, so I don't think they are worried about explaining it any further in the movies. Hulk tries to strike back, but Thanos blocks his blows. Thanos is a genocidal warlord from Titan, whose own main objective is to bring stability to the universe, as he believes its massive population would inevitably use up the universe's entire supply of resources and condemn it. As Marvel fans know, we’ve already seen five of these six stones.
Thanos is one of the most feared villains in the Marvel Universe, and he's usually one of the few villains who can truly accomplish his dark goals. Introducing Infinity Gauntlet: A Love Letter™ Game, a new one-versus-many twist on the bestselling card game set in the Marvel Universe. To complete this goal, Thanos set about tracking down the Infinity Stones, as the combined efforts might wipe out half the universe.
There are six infinity stones and six letters in Thanos’ name. [Carol and Bruce, wearing the Hulkbuster armor, restrain Thanos, and Thor chops off his left arm with Stormbreaker. In the Marvel Cinematic Universe, the Mad Titan successfully wiped out half of all living beings in the entire galaxy with the all-powerful Infinity Gauntlet before his showdowns with Earth's Mightiest Heroes in Avengers: Endgame. He then delivers a series of powerful punches, dazing Hulk. [Thanos grabs Hulk's wrists and peels them away. That is unless we get more information about Thanos in the next Avengers movie. His name, as the Avengers: Infinity War marketing blitz has already seared into your brain, is Thanos.