Apart from the energetics, since the atoms in layers 0, 11, and 21 are fixed as shown in Figure , they experience a non-zero force when the GB is deformed. The average magnitude of force on the fixed atoms is represented in Figure . This force drops at a relative displacement of 9.279 Å which coincides with the GB sliding. However, the structure and its energy does not return to that of the undeformed state as can be seen in Figure and. Sliding stops at a partially deformed structure, indicating that the stress release is not effective during sliding.