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Refined TiB precipitates in the EB-PBF-built alloy enable finer oxide formation than the larger precipitates in the forged alloy , and the resulting oxidation layers are more compact .
 precipitates, alloy, oxide, precipitates, alloy, oxidation, compact
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:
 precipitates, alloy, oxide, precipitates, alloy, oxidation, compact