Since Mjolnir had been broken during Thor: Ragnarok, Thor needed a new weapon to fight Thanos in Infinity War. He
visits the dwarfs that forged Mjolnir and gets a new weapon, Stormbreaker. One of the attributes of the weapon is that its handle is actually made of Teenage Groot's arm.
At the end of the Movie, Groot
disappears due to Thanos using the power of the Infinity Stones to kill half of the Universe's population.
Do we see what happened to the weapon at that moment?
Did the handle disappear?