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Strips. Tri-tip strips cook to rare in about 8 to 10 minutes, and to medium in 12 to 14 minutes. This is the total cooking time, so turn the strips over at the halfway point -- 4 to 5 minutes on each side for rare, and 6 to 7 minutes on each side for medium.Calman Lugo/iStock/Getty Images.trips. Tri-tip strips cook to rare in about 8 to 10 minutes, and to medium in 12 to 14 minutes. This is the total cooking time, so turn the strips over at the halfway point -- 4 to 5 minutes on each side for rare, and 6 to 7 minutes on each side for medium. Calman Lugo/iStock/Getty Images.
Sear the tri-tip for about four minutes. Turn it over, and place it in a baking dish with the seared side facing up. Cook for 30 minutes for rare or medium rare meat or 45 minutes for well-done. Use a meat thermometer to check that the internal temperature is between 135 and 150 degrees, then emove the meat from the oven and place it on a cutting board.