 This study investigates the fatigue behavior of an aluminum alloy, AA5083H111, in the rolling direction, RD, and transverse direction, TD. It shows that the SN curve consists of two linear curves with different slopes, and that RD specimens demonstrate longer fatigue life than TD specimens. This difference is approximately 25%, with fatigue lives ranging from 276,551 cycles for RD specimens, to 206,727 cycles for TD specimens. This difference may be due to larger L6, MN, Fe, particles in the TD orientation, which lead to greater stress concentration and shorter fatigue life. Micrographs of the fractured surfaces show that the fractures are typically ductile, regardless of specimen orientation. This article was authored by Bronco Nessimer, Frank Zupanik, Tomasz Wuerrer, and others. We are article.tv, links in the description below.