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A transition composition route was introduced ( Ti-6Al-4V→V→Cr→Fe→SS316 ) to avoid the intermetallic phases between Ti-6Al-4V and SS316 .
 transition composition, intermetallic, Ti-6Al-4V
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 transition composition, intermetallic, Ti-6Al-4V