A novel high β relaxation to a field reversed configuration (FRC) has been investigated by axially colliding two spheromakswith opposing toroidal magnetic fields. The β value of the merging toroids increasesfrom 0.1 to 0.7-1.0 within 15 μs, indicating an equilibrium transitionfrom the low β spheromak to the high β FRC.An important finding is that the merging spheromaks relax either to a high β FRC or to another low β spheromak,depending on whether the initial normalized magnetic helicitygiven to these spheromaks is smaller or larger than a threshold value. This fact suggests that the FRCs are equipped withsome global stability as robust as the Taylor magnetic energy minimum state.