The study investigates the flexibility and elasticity of freestanding single-crystalline antiferroelectric PbZrO₃ membranes, which have not been fully explored compared to their ferroelectric counterparts. The researchers successfully fabricated these membranes using a water-soluble sacrificial layer technique, achieving good antiferroelectric properties and a commensurate/incommensurate modulated microstructure. The membranes exhibit excellent shape recoverability, with a maximum recoverable strain of 3.5%, far exceeding that of bulk materials. Atomistic simulations reveal that this flexibility originates from the antiferroelectric-to-ferroelectric phase transition, facilitated by polarization rotation. This work not only elucidates the mechanism of high flexibility in antiferroelectric oxides but also paves the way for potential applications in flexible electronics, such as advanced flexible devices and heterogeneous integration with other substrates.The study investigates the flexibility and elasticity of freestanding single-crystalline antiferroelectric PbZrO₃ membranes, which have not been fully explored compared to their ferroelectric counterparts. The researchers successfully fabricated these membranes using a water-soluble sacrificial layer technique, achieving good antiferroelectric properties and a commensurate/incommensurate modulated microstructure. The membranes exhibit excellent shape recoverability, with a maximum recoverable strain of 3.5%, far exceeding that of bulk materials. Atomistic simulations reveal that this flexibility originates from the antiferroelectric-to-ferroelectric phase transition, facilitated by polarization rotation. This work not only elucidates the mechanism of high flexibility in antiferroelectric oxides but also paves the way for potential applications in flexible electronics, such as advanced flexible devices and heterogeneous integration with other substrates.