This chapter investigates the bistable behavior of tubular composite booms, where antisymmetric laminates enable stable folded/deployed states without external constraints, driven by Poisson effect-induced curvature-moment coupling. Model 1 assumes an Archimedean spiral, solving folded configurations via minimum energy; Model 2 uses spatial spiral equations and a two-parameter method, determining stability via stiffness matrix positive definiteness. Six samples validate the models, with theoretical polar radius/angle errors <9.42%/10.08% and failure indices <1. Parametric studies show increasing radius reduces failure risk, while thickness increases it, with length having minimal impact.