Defiant Weapon FusionTweet
(from Starfinder Core Rulebook)
A weapon with the defiant fusion resists efforts to be removed from its wielder. If you are wielding it when you are knocked unconscious, panicked, or stunned, it stays in your hand. You also gain a bonus to your KAC against combat maneuvers to disarm the weapon equal to one-fifth the weapon’s level (minimum +1).