  We investigated the possibility of temperature dependent lattice distortions
in the pyrochlore compound Tb$_{2}$Ti$_{2}$O$_{7}$ by measuring the internal
magnetic field distribution, using muon spin resonance, and comparing it to the
susceptibility. The measurements are done at temperatures as low as 70 mK and
external fields up to 6 kG. We find that the evolution of the width of the
field distribution can be explained by spin susceptibility only, thus ruling
out a temperature dependent hyperfine coupling. We conclude that lattice
deformations are absent in Tb$_{2}$Ti$_{2}$O$_{7}$.
