Titanium alloys are known to have texture heterogeneities, i.e. regions much larger than the
grain dimensions, where the local orientation distribution of the grains differs from one
region to the next. The electron backscattering diffraction (EBSD) technique is the method of
choice to characterize these macro regions, which are called macrozones. Qualitatively, the
images obtained by EBSD show that these macrozones may be larger or smaller, elongated or
equiaxed. However, often no well-defined boundaries are observed between the macrozones
and it is very hard to obtain objective and quantitative estimates of the macrozone
dimensions from these data. In the present work, we present a novel, non-destructive
ultrasonic technique that provides objective and quantitative characteristic dimensions of
the macrozones. The obtained dimensions are based on the spatial autocorrelation
function of fluctuations in the sound velocity. Thus, a pragmatic definition of macrozone
dimensions naturally arises from the ultrasonic measurement. This paper has three
objectives: 1) to disclose the novel, non-destructive ultrasonic technique to measure
macrozone dimensions, 2) to propose a quantitative and objective definition of macrozone
dimensions adapted to and arising from the ultrasonic measurement, and which is also
applicable to the orientation data obtained by EBSD, and 3) to compare the macrozone
dimensions obtained using the two techniques on two samples of the near-alpha titanium
alloy IMI834. In addition, it was observed that macrozones may present a semi-periodical
arrangement.