Turbine blade tip shroud with axially offset cutter teeth, and related surface profiles and method

A turbine blade tip shroud, comprising:

• a body comprising a pair of opposed, axially extending wings, wherein the body is configured to couple to an airfoil at a radial outer end of the airfoil, the body having a leading edge and a trailing edge opposing the leading edge, wherein the airfoil has a suction side, a pressure side opposing the suction side, a leading edge spanning between the pressure side and the suction side, and a trailing edge opposing the leading edge and spanning between the pressure side and the suction side;
• a tip rail extending radially from the pair of opposed, axially extending wings, the tip rail having a downstream side and an upstream side opposing the downstream side;
• a first cutter tooth adjacent the leading edge of the body of the turbine blade tip shroud on a selected one of the upstream side and the downstream side;
• and
• a second cutter tooth on the other one of the upstream side and the downstream side, wherein the second cutter tooth is spaced at a position axially distant from the first cutter tooth such that an axial distance from a rearward axial end of the first cutter tooth to a forward axial end of the second cutter tooth is at least 30% of an axial length of the tip rail.