A major drawback of additively manufactured metallic components is their poor high cycle fatigue (HCF) resistance, which is primarily due to the presence of porosity. Keeping this in view, the effect of process-parameters such as laser power, layer thickness, and scan rotation on pore size, shape, and distribution in selectively laser melted Ti-6Al-4V alloy specimens and the influence of these characteristics of the pores on the HCF life were investigated. The possibility of enhancing the fatigue strength (σf) of the as-fabricated alloy through microstructural modification, via a post-fabrication heat-treatment that substantially improves the threshold for fatigue crack initiation, and subsequent shot-peening were explored. Results show a marginal improvement in σf upon heat-treatment, whereas shot-peening enhances it substantially such that σf is up to 55% of the tensile-strength. These results were analyzed using the fracture mechanics-based K-T (Kitagawa-Takahashi) approach, which will be discussed in detail in this presentation.