* Alliteration: This is the repetition of consonant sounds at the beginning of words. While "Titch" and "Miller" both start with "M" sounds, they're not the same sound. "Titch" starts with a "t" followed by a "ch" sound, while "Miller" starts with a hard "m" sound.
* Assonance: This is the repetition of vowel sounds within words. There's a slight possibility of assonance with the short "i" sound in "Titch" and the "i" in "Miller," but it's not a strong example.
So, the answer is no, there's not a strong instance of either alliteration or assonance in "Titch Miller."
It's worth noting that alliteration and assonance are often used in poetry, song lyrics, and other creative writing to create a musical effect or emphasize certain words. However, these are not common features in everyday names.