  Telescope Array (TA) has recently published results of nearly nine years of
$X_{\mathrm{max}}$ observations providing its highest statistics measurement of
ultra high energy cosmic ray (UHECR) mass composition to date for energies
exceeding $10^{18.2}$ eV. This analysis measured agreement of observed data
with results expected for four different single elements. Instead of relying
only on the first and second moments of $X_{\mathrm{max}}$ distributions, we
employ a morphological test of agreement between data and Monte Carlo to allow
for systematic uncertainties in data and in current UHECR hadronic models.
Results of this latest analysis and implications of UHECR composition observed
by TA are presented. TA can utilize different analysis methods to understand
composition as both a crosscheck on results and as a tool to understand
systematics affecting $X_{\mathrm{max}}$ measurements. The different analysis
efforts underway at TA to understand composition are also discussed.
