Title: A Structural Model of Stellar Collapse: Phase Transitions and the Role of Superheavy Element Formation Abstract: This paper proposes a structural and information-based model for the evolution and collapse of massive stars, moving beyond conventional paradigms focused solely on nuclear fusion exhaustion. We explore a phased synthesis framework, where the interior of a star acts as a stratified structure of nuclear 'constructor' materials. We suggest that stellar collapse is not merely a gravitational event but a structural and energetic phase transition triggered by the formation of a final, superheavy element unique to each star. This model provides a unified view of macroscopic stellar dynamics and microscopic matter restructuring. 1. Introduction Traditional astrophysics views stellar collapse primarily as a result of iron-core formation and the subsequent halting of exothermic fusion processes. This paper introduces an alternative model based on structural evolution, ener