It isn't easy to retain and leverage the essence of a well-estblished mother brand (Titan) in a new business venture (eye wear) if the customer segment you are speaking to is not exactly the same.
Titan has a mass appeal in India, but has retained a slightly 'classy' position in our minds. With Titan Eyeplus, they seem to be speaking to a cost-conscious, style conscious, older segment (atleast from the ads). The father-daughter commercial, is not being followed up with a middle-aged gentleman trying on Titan Eyewear in response to some female attention. Plausible situation. The underlying messages of surprisingly low prices and solid quality are mechanically placed in the commercial. The overall execution is clean and well presented.
But it does not grow the brand or build on the brand's story in my mind. Perhaps its early for that?