Hulk's inability to break
There are things the Hulk can't do. The Hulk can't go on dates, do needlepoint, or wash a water glass. He doesn't do things regular people do. Because of that, it's hard for him to relate to them.
With a known resistance to all Earth-based diseases – which includes AIDS (yes, this was brought up in the comics) – the Hulk can survive almost anything, and as a result, it's tough to imagine a senior-aged Hulk rolling around in a wheelchair or moving into a retirement home.
Weakness: ADAMANTIUM AND VIBRANIUM
Swords, knives, and more have been used against Hulk and almost none of them even leave a scratch or mark on him. However, with that said, there are two bladed weapons that can cut into Hulk's skin. Adamantium is something that can cause damage to Hulk.
The Hulk's skin is nearly impenetrable and his lung capacity allows for long periods of submersion in water, exposure to many forms of gases, and even to temporary survival in the airless vacuum of outer space.
Apocalypse makes his way into this position on the list because he is technically stronger than the Hulk. He also has a multitude of other abilities, including telepathy, telekinesis, and shapeshifting.
Now to answer your question, no the Hulk cannot break Vibranium with his bare hands until he has some weapons made up of some stronger metal.
The Hulk also possesses immense swimming speeds as well. He has been clocked to be swimming at 80 knots, and has even matched Namor's underwater speed, even while Namor was moving quickly enough to create a whirlpool, much to the Atlantean king's surprise.
Professor Hulk has the attributes of three Hulks: Grey Hulk, Savage Hulk, and Banner. He is the weakest of all incantations because he will revert to Banner with Savage Hulk's mind if he gets too angry.
Marvel Comics has explained the Hulk's return with the reveal that the hero is actually immortal. Apparently, he always has been. The prologue of Avengers #684 highlights other times that the Hulk or Banner has died, beginning with Banner getting hit with the gamma bomb.
Yes, The Hulk can survive a nuclear blast at ground zero. In fact, nuke & gamma bombs and the like are used against him quite often. Here are few times the hulk has had massive explosions used against him. From his early days of comics to his more recent events.
Immortal Hulk is the result of Bruce Banner and the Hulk having been through different deaths and rebirths, allowing the Devil Hulk to seal the other incarnations away and become the dominant Hulk persona. Unlike the other Hulk incarnations, Immortal Hulk is content with waiting inside Banner.
Could Hulk ever become so angry/powerful that he could lift Thor's hammer? No. The Hulks strength may be unlimited, but the hammer can only be lifted by one who is worthy. The hammer is magic.
As you know, Bruce is a pretty thin guy, so we assume his junk is pretty standard — but The Hulk's junk is going to be massive. This is going to make sex a real gamble because you might end up with a 20-inch-long and 7-inch-wide veiny rod of tissue in one of two orifices . . . neither of which is going to pleasant.
Bruce became the Hulk after he was exposed to gamma radiation, which granted him the ability to transform into a green uncontrollable engine of destruction. Because of this the US military, local law enforcement, and even other superheroes have spent years trying to hunt him down.
Still, while the Hulk has the brawn, his brain is lacking. There have been other heroes who have gotten ahead of him just with their smarts and careful planning. Obviously, big hitters like Sentry, Galactus, and even Superman have been able to withstand the emerald giant's assault.
The Hulk may be one of Marvel's strongest superheroes, but one of the most underrated members of the X-Men, Havok, can defeat him in one simple move. Cyclops' brother, Havok, is one of the few Marvel superheroes who can defeat the Hulk in a fair fight.
Thaddeus E. "Thunderbolt" Ross – Betty Ross' father and the Hulk's nemesis, a military general who used to hunt him.
At his base level of strength and anger, the Hulk can run at around 300 miles per hour. There isn't any upper limit to his running speed because the angrier he gets, the faster he becomes.
At first, Bruce Banner just couldn't turn into the Hulk in daylight or while exposed to UV radiation. Now, it just seems that sunlight weakens the Hulk and interferes with his mental faculties.
During the Battle of the Rainbow Bridge, the two take their fight to the water, and Fenris rag dolls Hulk before biting into his leg, making him bleed.
Nobody is wielding Excalibur against the Hulk in the comics, but if someone were to pick it up and use it to remove his head from his shoulders, nobody would be surprised it could be done. Excalibur can literally cut through anything, including the Hulk.
Hulk's inability to break Wolverine and his adamantium claws isn't an indictment of the green monster's strength but more shows how strong Wolverine's metal-coated bones really are. If the Hulk can't snap his claws, then it's unlikely many other heroes or villains could do so, either.