 QB 2.0 strips were used to fabricate spiral tubes and actuators for controlled extension, stacers, through a novel technique, which resulted in increased tensile strength and decreased elongation rate compared to raw strips. The residual stress and microstructure evolution were investigated using XRD, EBSD, and TM, revealing that the strengthening mechanism for raw strips is twinning strengthening, while that for stacers is grain refining strengthening with a precipitation of the gamma phase. The relationship between macro properties and microstructure has been elucidated. This article was authored by Ruilong Liu, Jingtao Han, Zhang Huali, and others.