The scattering properties of TiO2 spheres are computed using the external Mie program. The optical constants of TiO2 have been taken from the SPRAY database. In order to avoid some numerical problems of the Mie software, a small imaginary part has been added to the dielectric function which would be purely real otherwise.
The radius distribution for the Mie computation is this:
The spectral and angular distribution of the scattered intensity is dominated by forward and backward scattering
If these particles are embedded in the resin with a volume fraction of 1% one gets the following absorption (blue curve) and scattering probabilities/distance (red):
In summary: The large TiO2 particles scatter light mainly in the forward direction. There is also pronounced backward scattering, but no absorption. All these properties are independent of wavelength.