Which tool is predominantly used for stitching surfaces together in Siemens NX?

The tool that is predominantly used for stitching surfaces together in Siemens NX is Surface Stitch. This tool allows users to combine multiple surface bodies into a single, more complex surface. It effectively recognizes and stitches together the edges of the surfaces that are adjacent to one another, ensuring that they are unified in a single entity. This process is critical in creating model geometries that require continuity and a smooth transition between surface boundaries, which is essential in CAD applications for both aesthetic and functional purposes.

Surface Trim, on the other hand, is used to modify surfaces by cutting them, rather than stitching them together. Surface Join typically refers to the merging of edges rather than the comprehensive stitching of entire surfaces, and Surface Merge is more associated with combining bodies rather than specifically stitching surfaces. Thus, Surface Stitch stands out as the correct tool for the task of stitching, making it the appropriate choice for this scenario.