There are a number of ways to tighten bolts, including the torque wrench. This is probably the most common method of bolt tightening, popular for its simplicity and its quickness.
Still there are some characteristics of torque tightening to keep in mind when you use these tools.
Bearing surface damage
Damage can occur due to friction between parts under heavy loads, particularly on the surface of the threads between nuts and bolts, and the bearing surfaces between flanges and nuts. Such damage will increase with each tightening, meaning the error in the final tightening load will increase as well.
It is often harder to unscrew a torqued bolt than it was to originally fasten it. Corrosion and damage to contact surfaces put a higher torque load on the bolts, which can damage other parts of the assembly and make untightening more difficult.