Table:
Composites	Carbon Source	Pre-Milled	Mixed Powders
Composite 1	raw CNTs	–	raw CNTs + Cu + Ti
Composite 2	ground CNTs	–	ground CNTs + Cu + Ti
Composite 3	ground CNTs	ground CNTs + Cu	Pre-milled + Ti

Transform the figure into Markdown format.

| Composites | Carbon Source | Pre-Milled | Mixed Powders | 
 | --- | --- | --- | --- | 
 | Composite 1 | raw CNTs | – | raw CNTs + Cu + Ti | 
 | Composite 2 | ground CNTs | – | ground CNTs + Cu + Ti | 
 | Composite 3 | ground CNTs | ground CNTs + Cu | Pre-milled + Ti |