He is mentioned as an Aditya (sons of goddess Aditi) in later Hindu scriptures like the Mahabharata and Puranas, though his significance gets reduced.
[1] In the Rigveda, Tvashtr is stated to be a skillful craftsman who created many implements, including Indra's bolt, the axe of Brihaspati, and a cup for divine food and drink.
[2][4] In order to have revenge for the murder of his son Vishvarupa, Tvashtr creates a demon called Vritra.
Tvashtr is associated with many other deities, Pushan, Savitr, Dhatr, Prajapati, and Vishvakarman, due to his role as a fashioner.
[2] Tvashta Dev mentioned in the RigVed 1.61.6 as below: अस्मा इदु त्वष्टा तक्षद्वज्रं स्वपस्तमं स्वर्यं रणाय । वृत्रस्य चिद्विदद्येन मर्म तुजन्नीशानस्तुजता कियेधाः Translation: Tvashtadeva prepared for Indra a powerful thunderbolt that penetrates the target well.