Abstract: The invention contemplates a technique and machine for completing the assembly of a turbine-rotor stage by precision-peening blade tenons to secure shroud segments to successive blades. In the machine, a turbine-rotor assembly of multiple stages of blades on a rotor shaft is mounted on a horizontal axis, with provision for indexing successive blade tenons of a given-stage into precise horizontal confrontation with tool elements successively presented to the tenon, the tool elements being independently mounted to a compound-axis slide system. A presser foot carried by the slide system locally holds the shroud segment to a seated position against the blade to be secured, while first an induction-heating element and then a riveting tool perform in programmed sequence upon the exposed end of the involved tenon.