anticipation: How good a player is at predicting what will happen and being able to get in the correct position earlier to give himself a better chance of being successful at what he is doing
Composure: Being able to stay calm and do the job you need to under pressure (e.g. striker scoring one on one. A striker with high composure will be more likely to score). Hope the example helps as I didnt know how to explain
If you anticipate something but are not in the right position, then yes they go hand in hand. Positioning is being able to stop a players run, due to being in the correct position, i would think
anticipation is guessing accurately what is going to happen before it happens. eg if you predict that a player is going to pass in a particular direction early, you can make an interception.