This document describes techniques, apparatuses, and systems for severing a cable tie with a rounded cut. Using a cable tie severing tool, a cable tie may be looped around an object and a tail portion received through a nosepiece assembly. A head of the cable tie may be aligned using an alignment indicator to ensure a rounded cut of the serrated portion of the cable tie at a finite distance from the head portion of the cable tie. A blade member may be displaced to sever the serrated portion of the cable tie and produce a rounded cut free of sharp edges. In this manner, the likelihood of abrasive damage from contacting the rounded cut may be reduced.