The static and dynamic fatigue of high‐strength glass fibers drawn with a 250‐W CO2laser and coated with a uv‐curable coating is presented and analyzed with respect to current theories. Theories of Charles and those of Wiederhorn and Evans are shown to reduce to a simple expression which accounts for the static‐ and dynamic‐fatigue data. Further, the strength of the coated glass fibers is directly proportional to the inverse temperature.