Laser powder bed fusion (LPBF) enables the production of complex geometries with high precision. However, the presence of pores within these specimens significantly impacts their mechanical performance [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 contributes to more efficient manufacturing by reducing overall processing time. This study focuses on the characterization of pore features in LPBF-manufactured specimens, utilizing low-dimensional descriptors 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. This allows to identify and analyze the pore structure within the components, allowing 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.