Theoretical Foundation and Eight Empirical Test Blocks of the Phoenix Axiom

This work presents Tensor Field Dynamics as a field-based alternative to the primary interpretation of gravitation as spacetime curvature. At its core is the Phoenix Axiom, built on a real tension field, gradient-based dynamics, and a unified zero-fit framework without phenomenon-specific parameter adjustment. On this basis, the document develops eight empirical test blocks: solar light deflection, Mercury perihelion advance, gravitational redshift, Shapiro delay, GPS clock drift, solar radar time delay, the S2 double test at the galactic centre, and the rotation curve of M31. According to the document, the calculated results agree with the chosen reference values in all test blocks. The central thesis is that spacetime curvature is not the primary physical cause, but the geometric macro-description of a deeper gradient physics.