Collision avoidance using momentum in bullet physics

I am developing a third party game using Bullet and Ogre. When a character model collides with an object in the world, for example, when turned on, the collision applies force to the character and makes them rotate. How can I prevent a collision applying force to a symbol?

I set the method for btDynamicsWorld :: setInternalTickCallback, and so I know which bodies collide, and btManifoldPoint.

Please note that I apply Torque to the body to rotate them smoothly, so I cannot just prevent the rotation.

Thank you for your help.