This paper introduces the Human-Centered Technology Integration Model (HCTIM), a behavioural systems architecture designed to stabilise technology adoption within complex organisations. HCTIM identifies five interacting behavioural variables — Mental Model Fit, Cognitive Load, Incentive Structure, Friction, and Feedback Loops, that determine whether technology integration converges toward a new behavioural equilibrium or regresses into dual-system instability. The model reframes adoption not as a linear implementation event, but as a transition between equilibria shaped by threshold effects, loss aversion, cognitive constraints, and social diffusion dynamics. Drawing on systems dynamics, behavioural economics, cognitive load theory, and organisational change research, HCTIM provides a structured methodology for anticipatory adoption design across three phases: pre-deployment diagnostic, transition calibration, and post-implementation stabilisation. Designed for application across AI deployment, automation transitions, governance redesign, and enterprise transformation initiatives, HCTIM functions as a behavioural integration architecture. It operates alongside the Human Elevation Score (HES) as part of a dual governance framework: HES governs strategic direction and system selection, while HCTIM governs behavioural stabilisation and transition. HCTIM is a foundational framework within the governance architecture of The Integrity Layer.