Data related to the research article "Additive manufacturing of metastable beta Ti-Nb-Fe-Sn alloys with tuned mechanical properties for biomedical implants: processing–structure–property relationships and alloy selection for implant design" (https://doi.org/10.1016/j.jmrt.2025.11.064). The article figures were produced solely from these data sets employing data processing methods described in the manuscript. 1. High-resolution schematic/SEM/EBSD images (related to Figs. 1, 2 (partially), 3, 4, 7, 8, 9, and 10) are available directly in the PDF and web version of the manuscript (published journal version). 2. Particle size distribution data, related to Fig. 2: Fig2_Particle_size_distribution_Sn.csvFig2_Particle_size_distribution_Ti.csvFig2_Particle_size_distribution_Ti-42Nb.csvFig2_Particle_size_distribution_Ti-20Nb-15Fe.csv 3. Microhardness data, related to Figs. 5 and 6: Fig5_Microhardness_100mms_100W_Batch1.csvFig5_Microhardness_100mms_100W_Batch2.csv Fig6_Microhardness_allparameters_Batch1.csvFig6_Microhardness_allparameters_Batch2.csv 4. EBSD data (including metadata) related to Fig. 9 are available in two open data formats: Fig9_Ti30Nb1Fe4Sn_300_300.angFig9_Ti30Nb1Fe4Sn_300_300.edaxh5 5. Porosity data, related to Fig. 11: Fig11_Porosity.csv 6. Elastic properties data, related to Fig. 12: Fig12_Elastic_properties.csv