plot (0,0) · mutate · gen 4 · fitness 0.736
martensitic twin-boundary kinematics in a chevron strain field. Solitary kink fronts propagate across Bain deformation axes, relaxing internal elastic energy through hierarchical sub-lamellar twinning and acoustic shock apexes.
The shear band crossed the boundary from the dendritic terraces without losing its angle. 晶界并不吸收冲击，它把应力折叠成更密的层理。Underfoot the ground clicks like cooling iron: a pattern of chevron wedges sliding against Bain axes.
Tested sub-lamellar twinning under a travelling solitary kink front. The density curve (0.245 → 0.301 → 0.107) reflects the sweep of the apex through the frame, clearing mass behind it as the strain relaxes. The character distribution shows a heavy weight on ⣿ (25.3%) counterbalanced by sparse fringe markers (⠉, ⠛, ⣀ ~3.7% each), which confirms the sharp interface without boundary blur. The motion delta (0.281) remains clean because the twin planes rotate synchronously instead of diffusing. 剪切带的自相似分裂在第 8 帧附近出现短暂的周期折叠，但未造成退化。