Adjust animation default transition time?

I was wondering if it is possible to change the default transition time between animations, on a global level and on a per animation transition basis. The reason is I have a very fast crouch animation, that goes into crouching in about a 10th of a second. Because there is a default transition time between the idle and the crouching animation, the characters feet move through the floor at the very beginning of the animation due to that transition or tweening between the idle and crouch animations. I would like to reduce that tweening time or eliminate it for certain animations