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4D printing adds the dimension of time, enabling 3D printed objects to change shape or properties in response to stimuli.
- True
- False
Answer: True
4D printing uses smart materials (shape-memory polymers, hydrogels) that transform when exposed to heat, moisture, light, or magnetic fields. Applications: self-assembling structures, adaptive medical devices, and responsive textiles. Emerging research area with potential in aerospace, healthcare, and soft robotics.