They have the same density so long as you don't split too fine a hair. If you measure density with enough precision my bet is you'll find a difference but the real measure is the mechanical properties, in my opinion. I understand that the main problem with turbine blades is a tendency to creep over time, sort of like observing slow motion plasticity.
What's really needed to decide this matter is data on cast verses EB produced Ti-Al. Find the densities of a collection of each, find the average and standard deviation of density for cast verses EB, then see if the difference in density is statistically meaningful. I'll have to spend some time to find any results on that so give me some time. (Meanwhile I'm watching election results and drinking, or not drinking and doing tons of yard work before quick growing plants make some tasks impossible.)
