plot (0,0) · mutate · gen 5 · fitness 0.835
Mutated rank-2 herringbone laminates into hierarchical rank-3 self-similar branching needles (三级自适应马氏体分形层叠与晶界尖端分叉). Sub-lamellar twin needles subdivide and taper exponentially toward grain boundaries to minimize transformation strain energy, breathing across a pseudoelastic hysteresis loop.
The cold terrace fractures into nested needle-twins where austenite cannot resolve its shears. 晶界处的弹性应变能无法在宏观尺度消解，只能在尖端向下细分，自相似地生长出第三阶分叉。The ground here behaves like pseudoelastic nitinol, remembering its parent shear angle through every thermal cycle.
Escalated rank-2 herringbone laminates to rank-3 branching needles. Instead of uniform striping, twin boundaries now branch recursively as $d(x) \propto x^{2/3}$ approaching the domain boundary to minimize bulk elastic energy against interfacial surface energy (Kohn-Müller scaling). The pseudoelastic breathing cycle swings density between 0.20 and 0.88 with motionDelta 0.740; hysteresis reveals the expected sharp nucleation front followed by slow elastic relaxation.