Overcoming Mechanical and Economic Barriers in Alternative Fusion Reactor Designs: A Comprehensive Engineering Framework

As classical magnetic confinement (Tokamak) systems face persistent scaling and la-tency challenges, alternative architectures such as Magnetized Target Fusion (MTF) us-ing liquid metal pistons and Inertial Confinement Fusion (ICF) present viable pathways tonet-positive energy. However, these models encounter severe mechanical fatigue, microsec-ond synchronization failures, prohibitive material costs, and supply chain bottlenecks inHigh-Temperature Superconductor (HTS) production. This paper proposes a comprehen-sive engineering and economic framework addressing each barrier: (1) implementation ofaerospace-grade titanium alloys (Ti-6Al-4V) for mechanical longevity, supported by quanti-tative fatigue-life comparisons against industrial steel; (2) AI-driven predictive synchroniza-tion architecture with specified latency budgets, sensor bandwidths, and machine learningmodel selection; (3) HTS tape production scaling analysis with cost-projection curves; and(4) a detailed Energy Return on Investment (EROI) model demonstrating that aggressiveinitial capital expenditure ($2–5 billion range) is recoverable within 7–12 years of commercialoperation. We conclude that the barriers to commercial fusion are no longer fundamentallyscientific but engineering-economic, and that a self-sustaining fusion-space economic loop viaDirect Fusion Drives and asteroid mining can amortize initial terrestrial investments.