3D printing with metal offers an opportunity to fundamentally alter structural engineering for extreme event protection. Recent research has sought to achieve resilience and minimize repair costs and loss of functionality by introducing sacrificial, replaceable structural elements. With 3D printing, metal fuses can be survivable instead of sacrificial, avoiding the necessity of modifying the structure after an extreme event. Protective fusing devices can passively control structural response through nonlinear dynamic phenomenological behavior, achieving self-centering with unconventional, innovative geometric configurations. Self-centering behavior can be achieved through primarily elastic large deformations, with secondary spring elements restoring the original configuration after large primary element displacements. Although 3D printed fuse material could primarily remain elastic, some regions (junctions of wires, springs, struts, and/or plates) would undergo inelastic demands. This presentation will discuss material properties of 3D printed metal components produced at the Nebraska Engineering Additive Technology (NEAT) Labs located at the University of Nebraska-Lincoln. The NEAT Labs include laser-based powder bed fusion (LBPF) and laser engineered net shaping (LENS) machines. Both machine types are hybrid, combining additive and subtractive (machining) capabilities. The limited data available in literature indicates that surface finish has a noticeable influence on high-cycle fatigue for 3D printed metal. As-printed parts have a visibly rough surface and poorer high-cycle fatigue performance. Machining and polishing provide progressively improved fatigue life. Experimental data will be presented to illustrate low-cycle fatigue behavior for as-printed and machined 3D printed metal parts. This data will inform design requirements to ensure that extreme event fuses will survive concentrated local cyclic inelastic demands while also providing global re-centering to the structure as a whole. The presentation will also provide illustrative examples for how the configuration of structural systems (such as the provision of 3D printed fuses at some but not all stories, and phenomenological characteristics of 3D printed fuses) can optimize global structure performance by converting portions of multi-story structures effectively into tuned mass dampers.