Animator.CrossFade

public void CrossFade (string stateName, float normalizedTransitionDuration, int layer= -1, float normalizedTimeOffset= float.NegativeInfinity, float normalizedTransitionTime= 0.0f);

public void CrossFade (int stateHashName, float normalizedTransitionDuration, int layer= -1, float normalizedTimeOffset= 0.0f, float normalizedTransitionTime= 0.0f);