Yes According to the official official website of Tears of the Kingdom, volcanic octopus can repair its durability by throwing weapons at it. It should be noted that only volcanic octopus can do it, because octopus in other areas don't inhale at all, and the effect can perfectly repair the durability of weapons. You can run directly to the octopus to scare it, throw weapons at it when it turns to earth, and then run away to complete the repair.