Spirit breaker and fist of titan

Sword "Spirit Breaker" has a habit to jump out of your hand to the ground from time to time during combat. We can respect habits of a sentient weapon. This doesn't happen too frequently and I already have a trigger to get it when it jumps. However. I have Fist of the Titan legacy. And I expect my grip to be firm enough to hold the sword regardless of whether it decides to go or not. It's like jumping out of stone itself, isn't it? Thanks.