This paper introduces coherence optimized mechanical structures within the MID/QC framework, reframing mechanical behavior as gradient field alignment rather than stress‑strain response. Structural performance is governed by coherence gradient geometry, curvature accumulation, and substrate stability. Buckling, fracture, and fatigue are unified as coherence collapse phenomena. The paper defines coherence aligned load paths, curvature‑based failure onset, and gradient native heuristics for structural design. Applications span civil, aerospace, mechanical, and robotic domains. This work completes the mechanical portion of Cluster 16 and prepares the transition into control systems and dynamic stability.