Dear friend Moyosore Fakoya

In SEM images of Ti-6Al-4V, the alpha phase appears with a darker color as its atomic number is lower than the beta phase, which appears brighter ( SEM images of Chips-Ti64-3TiB...). Researchers have examined the microstructure of Ti-6Al-4V using backscattered electron imaging (BEI) and found that both lamellar and bimodal microstructures were obtained after post-process heat treatment (Microstructural Modeling of the α + β Phase in Ti-6Al-4V ...).

I hope this helps! Let me know if you have any other questions.

Source:

(1) Microstructural Modeling of the α + β Phase in Ti-6Al-4V ... - Springer. https://link.springer.com/article/10.1007/s11663-019-01675-0.

(2) Effect of Heat Treatment on the Microstructure and Mechanical .... https://www.researchgate.net/publication/350395437_Effect_of_Heat_Treatment_on_the_Microstructure_and_Mechanical_Properties_of_Selective_Laser-Melted_Ti64_and_Ti-5Al-5Mo-5V-1Cr-1Fe.

(3) SEM images of Chips-Ti64-3TiB composites after heat treatment: (a,d .... https://www.researchgate.net/figure/SEM-images-of-Chips-Ti64-3TiB-composites-after-heat-treatment-a-d-855-C-1-h-and-955_fig3_365936221.

(4) How to distinguish the aplha phases in SEM images of different Heat .... https://www.researchgate.net/post/How_to_distinguish_the_aplha_phases_in_SEM_images_of_different_Heat_treatment_Ti64.

(5) The influence of heat treatment on the microstructure and properties of .... https://www.sciencedirect.com/science/article/pii/S1359645418309674.