Unlike Mjølnir, however, the weapon is not enchanted to prevent those deemed "unworthy" from holding it, making anybody with sufficient strength capable of using the weapon.
Unlike Mjolnir, Stormbreaker was never enchanted by the forefathers to only be held by the “worthy”. It was simply a powerfully forged weapon with near-indestructible properties. Cliff G. Anybody can pick up Stormbreaker.
Mjolnir is a hammer, and was enchanted by Thor's father, Odin, so that only those the hammer deemed "worthy" are capable of wielding or even lifting it. Stormbreaker is an axe, and although it does not have such a worthiness enchantment, its power is such that a mere mortal attempting to wield it would be driven mad.
Both Mjolnir and Stormbreaker were crafted by the Dwarves of Nidavellir, but Mjolnir was enchanted by Odin and Stormbreaker channels the power of the Bifrost. While Mjolnir required the user to be worthy, Stormbreaker simply requires someone who isn't a mortal to wield it.
Although Stormbreaker and Mjolnir have very similar properties and powers, Stormbreaker is the most powerful weapon wielded by Thor so far. The obvious reasons are that Stormbreaker is the physically larger weapon out of the two, and not to mention that it is an axe, which could well be more dangerous than a hammer.
As Thor described in Infinity War, Stormbreaker was a “Thanos-killing” weapon. Like Mjolnir, Stormbreaker is one of the most powerful weapons in the universe, and both Uru hammers nearly deal killing blows to Thanos in both Infinity War and Avengers: Endgame.
However, if you mean comics Thor, he can destroy planets bare handed. His powers over the storm arent dependent on a hammer. If you mean the MCU, then I would have to say yes. Eitri stated that Stormbreaker was created to surpass every weapon made before it, and Odin stated Mjolnir's power was enough to destroy worlds.
Many viewers have pointed out that Thanos was able to lift Stormbreaker without a problem, but this is because the ax isn't enchanted as Mjolnir is. Others believe Thanos lifted Mjolnir (although briefly) and have even argued that he would be worthy of doing so.
During a Vudu Viewing Party for Avengers: Infinity War, co-directors Anthony and Joe Russo revealed a key difference between Thor's hammer Mjolnir and his new ax Stormbreaker: the latter doesn't require worthiness. That's why Groot was able to lift the ax, not because he was worthy but because he didn't need to be.
Anyone who is worthy. Anyone who is worthy, shall possess the power of Thor. So if Thor can summon Stormbreaker, anyone worthy can summon Stormbreaker. So just like Captain America can summon Mjolnir, summon lightning etc., he can summon Stormbreaker and use it.
Because it could kill thanos, is more powerful and thor panicked. Had he thought to call Mjolnir thanks would have gone to catch it and it would have knocked thanos on his bottom or something similar. But because thor was reliant on stormbreaker because it was more powerful he did it without thinking.
Mjolnir is not particularly heavy, it weighs 42.3 lbs. The fact that almost no one except Thor can lift the hammer has nothing to do with it's physical weight. The hammer is enchanted so that only those deemed 'worthy' are able to wield it.
Actually everyone can lift Stormbreaker. Odin's enchantment was only for Mjolnir not for any other weapon which he would use in future. That is why Thanos was able to lift Stormbreaker and he was not worthy of Mjolnir.
The most likely reason is when Groot's arm was separated from him, it became a part of the full weapon and was enchanted to be virtually indestructible. Stormbreaker is a weapon of Nidavellir, which are magical, so it's entirely possible.
I think, quite simply, he underestimated both Stormbreaker and this more godly Thor. He had the power to simply snuff Thor from existence or fire a beam that nothing in the universe could stop. Or anything else he could imagine.
Stormbreaker survived a full blast from the IG utilizing all of its stones. Actually, not only did it survive, it overpowered it. Unless you think Hela's grip and innate powers is more destructive than all those stones combined then the answer is no, she can't destroy Stormbreaker.
The movie doesn't explain Thor's motivations for giving up Stormbreaker, but it makes sense that Chris Hemsworth simply wanted Love to have a powerful weapon to aid her in battle. It's unlikely that he could give her Mjolnir, considering that so few people in the MCU have been deemed worthy of its power.
Storm breaker is meant to be the strongest weapon of Asgard and could even summon bifrost, says Eitri. But there is no enchantment or spell on it like it was on Mjolnir. So one doesn't have to be worthy to weild it, just the strength to lift it. Clearly Thanos is capable of lifting it.
