Move your T-bones to the medium heat side of your grill and continue grilling. If you like your T-bone medium rare, grill for four to five minutes on each side or until a meat thermometer reads 130 to 140 degrees Fahrenheit.For a medium steak, grill six to seven minutes per side or until a meat thermometer reads 140 to 150 degrees.his thicker cut requires different treatment from a T-bone, for example, 1/2- to 3/4-inch thick. While grilling a thicker steak may be a bit trickier, a benefit is that with proper attention, your steak is less likely to dry out during cooking.