Laser powder bed fusion (LPBF) enables the production of complex geometries with high precision. However, the presence of pores within these components significantly impacts their mechanical performance, particularly under cyclic loading conditions [1]. This study investigates the influence of a second laser source on the resulting microstructure and subsequently the fatigue life of the material. The incorporation of the additional laser allows for better control over thermal gradients and cooling rates, which cannot only enhance material properties but also reduces overall processing time, makig the manufacturing process more efficient. Focusing on the characterization of pore features in LPBF-manufactured specimens, low-dimensional descriptors are utilized to quantitatively evaluate their effects on material properties. To gain deeper insights into the internal structure, X-ray computed tomography (CT) scanning is employed on each manufactured specimen. Identifying and analyzing the pore structure within the components, allows for a direct correlation between the experimental results and the underlying pore characteristics [2]. By systematically examining the pore structure, the complex relationships between processing conditions, resultant microstructural features and mechanical properties are evaluated. This approach not only enhances our understanding of how pore characteristics affect the material's behavior under cyclic loading but also aids in identifying optimal process parameters that reduce defect formation during manufacturing. REFERENCES [1] U. Gebhardt, P. Schulz, A. Raßloff, I. Koch, M. Gude, and M. Kästner, “Influence of CT image processing on the predicted impact of pores on fatigue of additively manufactured Ti6Al4V and AlSi10Mg,” GAMM-Mitteilungen, vol. 45, 2022, doi: 10.1002/gamm.202200017. [2] A. Raßloff et al., “Accessing pore microstructure–property relationships for additively manufactured materials,” GAMM-Mitteilungen, vol. 44, 2021, doi: 10.1002/gamm.202100012.