Tikka means chunks, so chicken tikka is "chunks of chicken".

Masala is a mixture of spices.

You can ask for Chicken tikka Masala (dry / gravy) the gravy will be a curry.

Chicken Tikka Masala is a roasted chicken chunks in a spicy masala yogurt sauce. The chicken dish is eaten with rice, pitas, and vegetables. The dish is popular in British restaurants.

Chicken tikka is basically roasted pieces of chicken that is covered with masala all over and cooked in a tandoor but chicken tikka masala is basically a type of subji made by adding chicken tikkas to it and is eaten with various sort of indian breads.

Chicken tikka masala is a South Asian dish based on Indian-style roast chicken chunks (chicken tikka) in a tomato, curry sauce. The cross-cultural popularity of the dish in the United Kingdom led former Labour foreign secretary Robin Cook to proclaim it as "Britain's true national dish". Indian dishes such as Murgh Makhani or Butter Chicken are similar in preparation and taste to Chicken tikka masala. In Pakistan, it is also known as Chicken Masala or Tandoori Chicken Masala.