This paper presents a numerical simulation study investigating the elastic response of a two-layer laminated timber beam under two idealized interlayer interaction conditions, namely fully composite and fully non-composite behavior. A finite element model was developed in Abaqus, in which spruce wood was represented using an orthotropic linear elastic constitutive model. The theoretical limitations of the structural response of the beam were determined by simulating the two interaction limit states. The precision and dependability of the suggested model in describing the elastic behavior of the beam in both interaction extremes are validated by the numerically generated force–displacement equations, which show outstanding agreement with available analytical solutions. Stress distribution and flexural stiffness are significantly influenced by the degree of interlayer interaction, according to additional examination of the stress fields. The layers function independently in the fully non-composite design, resulting in noticeable stress discontinuities at the interface; in contrast, stresses are constantly distributed throughout the cross-section in the fully composite structure, suggesting efficient shear transmission between layers. All things considered, the constructed fi-nite element model shows good predictive capability and offers an effective framework for further research into inter-layer shear interaction and structural optimization of laminated timber beams